Availability
Torque converters are considered one of the most mysterious mechanical components in today's vehicles. They function like a clutch, and keep the engine running even when the vehicle comes to a halt. By designing the stall speed to match both the engine and desired stall speed, ACC Performance converters help low-end idle speeds, improve performance, and acceleration. ACC Performance Products has emerged as an out-right leader in torque converters and here's why: * Boss Hogs are welded, not furnace-brazed; furnace brazing is not the best way to adhere torque converter components, it will erode and ruin the stators and all rotating parts * Industrial Torrington bearings handle more torque than smaller, uncased needle bearings * Aircraft aluminum washers instead of fiber washers put more horsepower and torque directly to the ground * ACC converters are hand-built and tested to ensure that you get the best converter money can buy * With returns below one percent, you are assured of the highest quality parts available * Street Bandit converters are designed to handle as much as 650 hp * Custom-engineered turbine hubs maintain the highest quality, strength, and durability * Stators are built with high-flow vents and channels for greater cooling to handle greater power and higher temperatures * Engineered with a single bolt pattern that makes ACC converters surprisingly light to free up your motor and allow it to gain rpm quicker Notes: * Boss Hog Street Bandit torque converters are not designed to handle the extreme shock and abuse of nitrous oxide or trans-brakes * It is imperative that a transmission cooler be added with any torque converter that is rated over stock stall speed
( 99 )
$400.35
—
$788.02
ATI torsional input shafts work like a torsional spring bar--twisting and returning to totally eliminate breakage, while reducing shock loads to the gear train. They are manufactured from top-quality 300M or Vasco for maximum durability. Available for GM Powerglide or TH400 splines, these ATI torsional input shafts will add some reliability to your drivetrain.
( 11 )
$189.95
—
$881.99
Summit Bucks
Sonnax Smart-Tech drum modules for racing GM TH400 transmissions improve on-track performance and consistency, leading to quicker ETs, more wins, and greater reliability. The TH400 is preferred for its overall durability and multitude of available ratios, but is known to be heavier and less efficient than the popular two-speed Powerglide. Part of the TH400 inefficiency results from the fact that the direct drum counter-rotates, spinning backwards in 1st gear, brakes to a complete stop on the 1-2 shift, then goes from 0 RPM to input RPM on the 2-3 shift. Significant energy is wasted through this cycle that robs power, upsets traction on the shifts, and contributes to broken internal parts. Compared to aluminum direct drums, the Smart-Tech drum module reduces the weight of the counter-rotating components by over 3.3 lbs.! And more significantly, because the weight of the Sonnax counter-rotating parts is closer to the centerline, there's a 68 percent reduction in energy required to stop and restart during the 1-2 and 2-3 shifts. The benefits are increased wheel horsepower, better acceleration, less shock on the shifts, and improved durability. * Complete kit (34555-01K) replaces both forward and direct drums and includes everything from intermediate sprag to the pump; a selection of Sonnax input shafts is available separately. * 100 percent new content, no used core pieces * Includes larger-diameter, 36-element sprag and sprag race that works with OE intermediate clutches * Includes six-friction forward clutch pack and seven-friction direct clutch pack Contents: * Forward Piston Housing * Forward Piston * Forward Piston Return Springs (16) * Forward Spring Retainer * Forward Snap Ring * O-Ring 1.674 in. * Lip Seals (2) * Direct Housing Assembly * Direct Piston * Direct Piston Return Springs (26) * Direct Spring Retainer * Direct Snap Ring * O-Ring 2.737 in. * Sprag Shaft * Front Sprag Retainer Plate * Heavy-Duty Sprag 36 Element * Outer Sprag Race * Rear Sprag Retainer Plate * Sprag Retainer Screws (4) 6-32 x 5/16 in. * Quad Ring Seals (2) * Anti-rotation Seal Rings (2) * Drum * Pressure Plate * Outer Snap Rings (4) * Bearing Small * Forward Clutch Hub * Bearing Large * Direct Clutch Hub * Steel Clutch Plates (4) .060 in. * Steel Clutch Plates (11) .077 in. * Friction Clutch Plates (13) .080 in. * Clutch Separators (60) .103 in.
Not Yet Reviewed
$3,052.40
Torque converters are considered one of the most mysterious mechanical components in today's vehicles. They function like a clutch and keep the engine running even when the vehicle comes to a halt. By designing the stall speed to match both the engine and desired stall speed, ACC Performance converters help low-end idle speeds, improve performance, and acceleration. ACC Performance Products has emerged as an out-right leader in torque converters and here's why: * Boss Hogs are welded, not furnace-brazed; furnace brazing is not the best way to adhere torque converter components, it will erode and ruin the stators and all rotating parts * Industrial Torrington bearings handle more torque than smaller, uncased needle bearings * Aircraft aluminum washers instead of fiber washers put more horsepower and torque directly to the ground * ACC converters are hand-built and tested to ensure that you get the best converter money can buy * With returns below one percent, you are assured of the highest quality parts available * LS Street Bandit converters are designed to handle as much as 650 hp * Custom-engineered turbine hubs maintain the highest quality, strength, and durability * Stators are built with high-flow vents and channels for greater cooling to handle greater power and higher temperatures * Engineered with a single bolt pattern that makes ACC converters surprisingly light to free up your motor and allow it to gain rpm quicker Notes: * LS Boss Hog Street Bandit torque converters are not designed to handle the extreme shock and abuse of nitrous oxide or trans-brakes * It is imperative that a transmission cooler be added with any torque converter that is rated over stock stall speed
( 10 )
$500.44
—
$874.24
Summit Racing™ intermediate shafts are machined from Vasco 300M steel. This material is exceptionally strong and resilient, allowing these intermediate/main shafts to withstand the most severe torsional shock. You can be confident they will not twist or break under stress--and will handle the power you put to your automatic transmission.
( 4 )
$318.99
ACT race clutch discs are available in three distinct styles--choose the options that best suit your application. Spring-centered discs are the most popular and feature reduced driveline shock and spline wear with quieter operation. Rigid-hub versions offer improved durability but increase gear noise and spline wear. For either of those hub designs, you can choose six pads for better heat management and engagement, or four pads for the quickest shifting. Sintered iron discs offer the highest torque capacity and ultra-high heat capacity. They're designed for cars using clutch-less shifting or drag racing transmissions. Additional product details: * Premium ceramic friction materials provide high-heat tolerance, high coefficient of friction, and low wear rates * Carefully broached splines provide exact fit onto the transmission input shaft for long spline life and better clutch release * Heavy-duty torsional dampening springs are provided in the best sizes and spring rates to help reduce noise * Drive plates are made of high-carbon steel; heat-treated and black zinc coated to resist bending, cracking, fatigue, and rusting * Certified to SFI specifications
( 23 )
$135.99
—
$361.00
ATI 300M intermediate shafts are part of the company's extensive line of automatic transmission input shafts. Grade 300M is a high-strength, low alloy steel. Torsional input shafts work like a torsional spring bar, twisting and returning to totally eliminate breakage while reducing shock loads to the geartrain. The intermediate shafts are designed to fit either the Powerglide or TH400 splines. Order the replacement recommended for your application.
Not Yet Reviewed
$269.00
On Sale
Hays Street 650 clutch conversion kits are designed to handle highly modified engines up to 650 hp naturally aspirated (600 hp for forced induction and nitrous combinations). The new 26-spline versions work in conjunction with a modern 5- or 6-speed transmission swap. These are true street/strip clutches for spirited high performance driving or frequent track use. The high performance dual-friction disc utilized in the Street 650 has an upgraded spring hub with heavy-duty damper springs to handle greater shock loads versus a standard damper spring. The disc features a sintered metallic friction surface and an organic friction surface. It does a great job at dissipating heat and fighting the slippage found in ordinary discs, along with providing the smooth engagement characteristics of a street-style clutch. These conversion kits also provide an upgraded heavy-duty pressure plate to round out the performance clutch. The Street 650 is a great choice if you visit the track often. Order the model recommended for your vehicle application. Features and benefits: * Upgraded damper springs deliver up to 30 percent more clamping pressure than stock OE clutch * Dual-friction disc offers the best of both worlds—smooth engagement and excellent holding capacity * All Street 650 clutch kits come complete with pressure plate, disc, throwout bearing, and alignment tool
( 6 )
$1,149.95
$533.95
—
$1,399.95
ATI heavy-duty Vasco intermediate shafts are manufactured from Vasco Max C300 steel and available for a variety of transmissions. This material is exceptionally strong and resilient, allowing these intermediate/main shafts to withstand the most severe torsional shock. Some shafts feature a solid design (for center lube transmissions only) with no lube holes to help eliminate premature fractures. Order the ATI heavy-duty Vasco intermediate shafts best suited for your application.
( 3 )
$329.85
—
$339.85
Hays Twister Full Race Torque Converters feature a custom-designed anti-balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans-brake and great for power adders such as nitrous, superchargers, and turbos. They're available with various RPM stall speed offerings to accommodate any mixture of modifications—including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss. Additional product features: * All Full Race Series converters are built, tested, and proven to support up to 1,000 hp * Designed to handle the extreme shock and abuse of trans-brakes, nitrous oxide, superchargers, and turbochargers * State-of-the-art spray welding process is used in select areas. Spray welding provides clean, strong, and consistent fusion while also increasing strength through hardening from higher process temperature * Each converter is hand-built and inspected in every step of assembly to ensure top-of-the-line quality * All Hays torque converters are internally welded, compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency * Heavy-duty Torrington bearings are used for greater strength and durability * Stators are chosen with high-flow vents and channels to promote cooling in heat-producing higher horsepower applications * Increased horsepower and acceleration due to a weight-saving, one-application design. Almost all Hays converters are built for one application to reduce weight, compared to a multi-bolt pattern converter * Full Race Series torque converters are offered in several different stall speeds for popular automatic transmissions.
( 1 )
$899.95
—
$1,949.95
RAM Force 10.5 dual disc clutch kits have a strap-driven floater plate and are precision-balanced for quiet operation. The sprung hub top disc absorbs shock and reduces driveline noise. Force clutches are available with your choice of a 300 Series friction disc or a 900 Series disc. The 300 Series organic disc models are capable of handling 500 to 800 hp; while the 900 Series metallic models can handle between 600 and 1,200 hp. These kits use a marcel spring—a thin, wavy device that helps to eliminate the go-or-no-go tendency that similar dual disc clutches have. RAM Force 10.5 dual disc clutch kits include a billet aluminum, SFI-certified flywheel with a steel insert that has sufficient mass to draw heat away from the clutch without distortion. Some kits are available with a steel flywheel. Order the model recommended for your vehicle and engine application.
( 4 )
$1,425.00
—
$1,859.00
RAM Pro Street dual disc clutch kits are precision-balanced for smooth operation—and come equipped with a billet cover for optimum release length, a comfortable pedal effort, and a high diaphragm finger position for excellent high-RPM shifting capability. The sprung hub top disc absorbs shock and reduces driveline noise. Pro Street kits are available with your choice of an organic friction disc or a metallic disc. Organic disc models are capable of handling 500 to 800 hp; the metallic disc models can handle between 600 and 1,200 hp. RAM Pro Street dual disc clutch kits include a billet aluminum, SFI-certified flywheel with a steel insert that has sufficient mass to draw heat away from the clutch without distortion. Some kits are available with a steel flywheel. Order the clutch recommended for your vehicle and engine application.
( 1 )
$1,899.00
—
$2,199.00
Dura-Bond automatic transmission bushings are available in a wide range of offerings covering the aftermarket and today's needs for improved quality and tolerances. Individual bushings and kits are available, as well as semi-finished options that allow you to machine bore for proper fit and centerline accuracy. Dura-Bond transmission bushings feature seamless construction that makes installation easy, eliminating breakage and bushing surface interruptions. * Full round Babbitt bushings: Tight tolerances, no walking, no possible split when installing, wall tolerance of .0005 and O.D. tolerance of .001 * Bronze bushings: Hard and strong, long lifespans; resist shock, impact, wear, and corrosion * Coated bushings: Retains transmission engine oil on the surface, even under extreme heat and pressure, providing secondary lubrication in the event of momentary oil starvation * Dry film lubricant coating: Provides solid lubrication of parts subject to torque or contact stresses for maximum fatigue life, improved surface properties, excellent load carrying capacity, and intermittent dry lubrication * Bushings with indents: Provide lubricant reservoirs for better oil retention that allows for excellent and prolonged service * Bushing kits are constructed with all the necessary bushings to complete a rebuild and are manufactured to precise OEM dimensions for an exact fit
( 10 )
$2.50
—
$163.99
Ram 300 Series clutch discs feature a polyurethane-encapsulated sprung hub to handle higher shock loading than standard discs. They also have premium, non-asbestos, organic facings bonded to a steel backing for better heat dissipation and greater strength. Available with a flat carrier (300 Series race) or a marcel carrier (300M Series) for reduced chatter and smooth engagement, they work great for race or Hot Street applications.
( 5 )
$107.00
—
$369.00
Summit Bucks
Sonnax enhanced performance accumulator springs provide firmer 1-2 shifts for enthusiasts who appreciate quick, positive shift feel in their GM units. The design of these springs provides a performance shift feel, without reducing accumulator piston travel. This allows for a firmer—but still cushioned—shift that minimizes shock to the band and shafts. These springs also may be used as a replacement for THM 350 direct accumulator piston springs. Hit the road enjoying the perfect shift feel with Sonnax enhanced performance accumulator springs.
( 2 )
$12.38
—
$25.91
Summit Bucks
The Sonnax automatic transmission reverse servo spacers provide a simple, low-cost way to add durability to the GM 4L80-E and 4L85-E transmissions and eliminates the need to retrofit early design reverse servo pistons into late units. Due to a design change in 1996, it had been found that the reverse servo piston commonly breaks because it is stressed more than early servos. Installation of Sonnax reverse servo spacers reduce piston stress by increasing the contact area between the aluminum piston and spacer and incorporating a cushion spring washer. The new contact area is over two times the original and the pressure between the piston and the spacer is reduced by 60 percent. The reverse servo spacer kits easily install during assembly and does not require machining or other modifications. Excessively high line pressure in 'Reverse' is directly related to boost valve wear and cross-leaks into the EPC oil circuit. For maximum durability, inspect and replace the boost valve with one of the Sonnax 4L80-E boost valve kits (sold separately). Product features and benefits: * Increased contact area reduces pressure between apply pin and piston by 60 percent * Added Belleville spring washer reduces shock on piston * No machining necessary, drop-in components * Maximum durability for minimal cost
Not Yet Reviewed
$12.91
Trinity Racing World's Best Drive Belts feature 3rd Generation heavy-duty, high-twist Aramid fiber cord for high-horsepower tensile load requirements—making them the strongest belts on the market, surpassing even Trinity's EX and Sand Storm lines. They offer the highest shock load rating to date, able to withstand the power of 400 hp machines. The gilmer-style belts feature increased top cog pressure load design that increases sidewall rigidity, prevents top cog bowing, but still allows for increased rotational flexibility. The bottom cog uses high-modulous rubber compound (BZX1) for better heat resistance and heat dissipation; cogs are also impregnated with short Aramid fibers for better belt-to-sheave adhesion and reduced overall belt temperature. Order the replacement belt recommended for your vehicle. Additional details: * Latest bottom cog design for greater rotational efficiency at full shift * Precision ground sidewall angle (SCUFFING) for smooth engagement, increased power transfer and lower operating belt temperature * Aramid fiber cord, versus polyester, wraps over bottom cogs for increased bottom cog strength * Increased cord pop-out resistance * Manufacturing, quality control certifications: ISO-14001, ISO-9001, and IATF-16949 * These belts are for the rider/racer who wants the latest in technology and proven performance
( 2 )
$126.50
—
$178.99
Stage 8 locking flexplate fasteners retrofit easily and are available in both U.S. and metric sizes. Unaffected by shock, vibration, or thermal cycling, Stage 8 fasteners keep automotive components tightly bolted together, increasing dependability.
Not Yet Reviewed
$50.72
—
$72.41
These double-welded Hughes heavy-duty flexplates are .035 in. thicker than OEM and, in most applications, will withstand the punishment and shock of today's high-horsepower and high-rpm engines. For street, strip, and off-road strength, Hughes Performance meets the needs.
( 20 )
$49.99
—
$258.99
J.W. Performance output shafts were built for serious horsepower applications. They are made of E-4340 triple alloy chromoly steel for deeper hardening, shock and impact resistance, with excellent torque strength. They are a short-style design for dragster-type applications and will require machine work before installation. If you're serious about power and want the best performance from your race car, J.W. Performance output shafts will help you reach that goal.
Not Yet Reviewed
$134.74
Exedy Stage 2 clutch kits are designed to handle the abuse of high-power modified engines. The cerametallic friction disc material can handle much more abuse than stock type disc assemblies without slipping and fading. All Stage 2 clutch discs have sprung center dampers to reduce the impact and shock loads transmitted through the drivetrain. Two types of cerametallic discs are available: "thick" and "thin," along with a cushion button disc. Order the option preferred for your vehicle.
Not Yet Reviewed
$560.62
—
$699.25
Exedy Stage 1 organic racing clutches only use premium friction materials that are resistant to slippage and burst. Increased clamp loads provide the necessary capacity to handle modified engines. These clutches are ideal for street and light horsepower track use; drivability is similar to the stock clutch. Pedal efforts will be slightly higher because of the higher clamp loads. All Stage 1 clutch discs have spring center dampers to reduce drivetrain shock and provide smooth clutch engagement. Order the kit recommended for fitment on your vehicle.
Not Yet Reviewed
$304.95
—
$437.83
Hughes Performance Extreme series flexplates are a full 4mm thick and are designed to withstand the punishment and shock of high-horsepower, high-rpm engines! These high-strength steel flexplates will handle all Hughes high-stall converters for the ultimate performance setup!
Not Yet Reviewed
$256.99
Advanced Clutch Technology (ACT) Mod-Twin 225 Maxx Extreme twin-disc race clutch kits are available in two styles—Sprung Race and Rigid Race—for a variety of applications, including many Subaru and Mitsubishi models. Here are descriptions of each: * MOD-TWIN 225 XX SPRUNG RACE CLUTCH KIT: Performs aggressive launches and smoother shifting in high-powered AWDs by combining twice the ceramic friction surfaces with an ultra-durable mono-drive sprung hub assembly in a completely modular design. Each diaphragm spring endures an exclusive 4-stage heat treating process, providing a consistent pedal feel requiring moderate effort. Puck-style friction plates with high-quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These plates uniformly transfer torque to a mono-drive sprung hub assembly which extends input shaft life and reduces driveline shock from torsional vibration. This kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, sprung mono-drive hub assembly, floater, patented Monoloc Collar, release bearing, alignment tool and pilot bearing (if needed). -- Features and details: Predictable aggressive engagement, increased pedal effort, smooth shifting, possible start-off judder with OE to mild transmission gear noise; forged aluminum cover, mono-drive hub, exclusive diaphragm, premium friction materials, and hardened wear points ensure this long-life twin performs and survives under the most demanding conditions; delivers maximum performance and high heat tolerance by combining robust design, strategic features, choice materials, and close tolerances; Drag, Road or Rally Racing; Applying tactical engineering to the Mod-Twin, ACT presents unique solutions to common tradeoffs found on twin disc clutches, resulting in an ultra-durable, customer serviceable, long-lasting clutch with very high torque capacity. All are 100 percent clamp load tested, balanced and SFI certified. * MOD-TWIN 225 XX RIGID RACE CLUTCH KIT: Tackles aggressive launches and rapid shifting of high powered AWDs by combining twice the ceramic friction surfaces with a no-nonsense solid mono-drive hub in a completely modular design. Each diaphragm spring endures an exclusive 4-stage heat treating process, providing a consistent pedal feel requiring moderate effort. Puck-style friction plates with high-quality ceramic friction materials deliver high friction coefficient, superior heat capacity, and long clutch life. These plates uniformly transfer torque to a mono-drive chromoly steel hub which is heat treated for strength and durability, extending input shaft life with one continuous spline. The lightweight, rigid design allows for quicker shifts and trouble-free service. This kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid mono-drive hub, floater, patented Monoloc Collar. -- Features and details: Predictable aggressive engagement, increased pedal effort, quick shifting, possible start-off judder with mild to moderate transmission gear noise; forged aluminum cover, mono-drive hub, exclusive diaphragm, premium friction materials, and hardened wear points ensure this long-life twin performs and survives under the most demanding conditions; delivers maximum performance and high heat tolerance by combining robust design, strategic features, choice materials, and close tolerances; Drag, Road or Rally Racing; Applying tactical engineering to the Mod-Twin, ACT presents unique solutions to common tradeoffs found on twin disc clutches, resulting in an ultra-durable, customer serviceable, long-lasting clutch with very high torque capacity. All are 100 percent clamp load tested, balanced and SFI certified.
Not Yet Reviewed
$1,878.00
—
$2,108.00
Modal Header
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
