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Proforged Fast Ratio Pitman and Idler Arm Kits

Proforged fast ratio pitman and idler arm kits are bolt in steering components designed to quicken your stock steering ratio from 16:1 to 12:1. These kits improve your stock steering from 3.5 turns to 2.75 turns lock to lock. This quick ratio was previously found on rare AAR Cudas and T/A Challengers. Each kit is made from forged heat treated housings and ball studs for rugged durability and black e-coated to prevent rust.

4.0 out of 5 stars ( 8 )

$215.96

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QA1 Rear Pro Coilover Conversion Systems

Here's an easy way to convert your stock rear suspension to a coilover suspension. You get everything you need with these QA1 Rear Pro coilover systems, from shocks to nuts and bolts, complete installation instructions, and even decals!

4.63 out of 5 stars ( 104 )

$719.96

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$926.96

QA1 Pro Rear Parallel 4-Link Systems

QA1's Pro Rear Parallel 4-Link systems with panhard bar kits simplify the fabrication process for vehicles that lack aftermarket suspension support—and offer an easy solution that provides ride height adjustability and a simple installation process. These DIY kits produce professional-quality results and great looks in a convenient package. Designed for the DIY enthusiast, each kit contains high-quality, MIG-weldable components that ensure a safe and well-engineered design that'll give your favorite truck or hot rod the stance and ride quality it deserves. The systems are available in three models: * Basic, with no shocks or springs * Single-adjustable, with coilover shocks (150 lb. spring rate) * Double-adjustable, with coilover shocks (150 lb. spring rate) ADAPTABILITY: Kits include all necessary components and hardware for assembling and mounting the trailing arms, shock mounts, and panhard bar. The raw components can be cut to length and welded as needed, allowing for seamless adaptation to a wide range of applications. PACKAGING and SIMPLICITY: The parallel 4-link system, by design, packages easily into many applications, making it an ideal solution where space is limited. The parallel 4-link system is easy to tune, making it a great choice for DIY mechanics while still meeting the demands of high-end builds. Powdercoated trailing arms with forged bushing ends offer great looks, durability, and offer a smooth, compliant ride. TUNABILITY and RIDE HEIGHT ADJUSTMENT: Adjustable coilover brackets provide ride height adjustment so you can tune in the perfect stance for your ride. The included panhard bar and adjustable trailing arms ensure you can fine-tune your axle position and pinion angle for proper function and control. KIT CONTENTS: -- Powdercoated trailing arms with forged bushings and provide adjustment from 24 5/8 in. to 25 1/2 in. in length -- Trailing arm axle brackets for 3 in. axle tubes -- Panhard bar max length 37 in. -- 40 in. trailing arm crossmember -- 40 in. shock crossmember and mounting tabs -- All required hardware -- NOTE: Single- or double-adjustable models also include coilover shocks

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$1,039.46

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$1,782.86

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QA1 HD Pro Rear Drag 4-Link Systems

QA1 HD Pro rear drag 4-link kits are built to put down serious power! Streamlining the fabrication process, these systems deliver professional-grade results and performance in a convenient, easy-to-order kit. They are designed for the hardcore, discerning, do-it-yourself racer looking for a no-compromise solution to take their vehicle to the next level in performance and adjustability. Offered with or without QA1's MOD Series 4-way adjustable coilover shocks, or 7 in. travel, track-proven single or double adjustable coilover shocks, each kit contains high-quality, MIG-weldable components to ensure a safe and properly engineered design that can be easily adapted into many drag racing setups. A components kit is also offered without coilover shocks and lateral locating device. Find convenience, safety, and performance all in a QA1 HD Pro rear drag 4-link system. Select the kit best suited to your drag race suspension setup. Features, benefits, and contents: * Drag race-style 4-link design: -- Performance and adjustability -- Wide range of instant center tuning and on-car adjustability -- Components can be cut to length -- 40 in. or narrower frame rails * 1/4 in. thick plates * 1 1/4 in. diameter, 22 in. length trailing arm tubes * Grade 8 hardware * QA1 chromoly rod ends * 40 in. shock crossmember and mounting tabs * 40 in. diagonal link kit with mounting brackets (not in components kit)

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$511.16

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$2,426.36

Speedtech Performance USA Rear Suspension Systems

Speedtech Performance USA rear suspension systems utilize Articulate technology on the upper and lower trailing arms to rotate laterally while the suspension travels through its normal range of motion. This greatly reduces bind and maintains better geometric curves. Delrin bushings throughout eliminate the flex of rubber and squeak of urethane. Speedtech's chassis-mount adjustable sway bar allows the bar to work at its full potential. With the available added feature of a bolt-in true coilover shock conversion, you'll be able to tune your suspension to reach its max performance! The base rear suspension systems include Articulate adjustable no-bind upper and lower trailing arms, Delrin bushings, adjustable 1 in. tubular rear sway bar, Grade 8 hardware, and instructions. They feature QA1 double adjustable coilover shocks, allowing for 19 setting positions for both compression and rebound settings—that's a total of 361 different valving combinations! Precision-machined PTFE/bronze-wrapped pistons on 5/8 in. hard chrome plated rods are encased in clear anodized, lightweight aluminum housings. Left-hand threads avoid shock separation when adjusting your ride height. Speedtech systems are available for a variety of vehicle applications from the 1960s and '70s.

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$2,441.79

Proforged Stealth Brake Bias Bolt Kits

Proforged stealth brake bias bolt kits are designed to change your stock brake bias from 95% front / 5% rear to 65% front / 35% rear. It also removes the delay in onset for the rear brakes, reducing brake dive, evening out pad wear, and firming up the brake pedal. They replace existing bolts in your factory proportioning valve to remove the flow restriction that causes front brake delay, allowing all of your brakes to engage simultaneously and significantly improving your braking ability.

5.0 out of 5 stars ( 9 )

$56.66

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QA1 Sway Bars

QA1 sway bars afford improved handling and control by reducing body roll. They're manufactured from lightweight 4130 chromoly steel and 1045 cold-formed steel—with a gloss black powdercoat finish for maximum strength, endurance, and corrosion resistance. The QA1 sway bars are precision CNC-formed, ensuring proper mounting in the stock location for a true bolt-on installation. They also feature adjustable end links to customize roll stiffness to your personal specifications. These sway bars from QA1 include greaseable graphite polyurethane bushings, along with high-quality zinc plated hardware. Engineered and road-tested to give your ride the grip that it needs to hold the road, QA1 sway bars are available for fitment on many vehicle applications. Order them individually for the front or rear—or in a complete kit.

4.59 out of 5 stars ( 140 )

$236.66

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$881.96

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QA1 GM 2.0 Pro-Touring Control Arms

Designed for the pro-touring GM enthusiasts, QA1 GM 2.0 pro-touring control arms are a simple upgrade over original suspension or worn and outdated tubular control arms. The pro-touring arms are also for those wanting to improve their overall handling, ride quality, and vehicle stance. These arms will improve suspension geometry over the factory configuration and pave the way for planning additional upgrades. The high-strength, low alloy steel enables optimized thinner wall construction and results in overall lighter weight. The increased positive caster design improves straight line stability. Pro-touring arms also feature QA1's stronger, low maintenance, and rebuildable ball joints which feature integrated dust boots. Note: These control arms are not compatible with OE-type springs, a coilover system must be installed. QA1's arms will accept factory type sway bars and include upper and lower bump stops.

5.0 out of 5 stars ( 16 )

$665.96

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$851.36

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QA1 GM 2.0 Drag Race Control Arms

Designed for the specific needs of drag racing, QA1 GM 2.0 drag racing control arms are bolt-in upgrades to the original suspension or outdated tubular control arms. Besides improving overall handling, ride quality, and vehicle stance, these arms improve factory suspension geometry and pave the way for planning additional upgrades. The increased positive caster design improves straight line stability. QA1 arms are compatible with OE-style sway bars and come with droop stops on the upper arms with bump stops on the lowers. The droop stops are adjustable to enable the perfect front-end rise for optimized launches. These arms feature ultra-low friction composite bushings for smooth bind-free movement and optimal weight transfer during launch. The high-strength low alloy steel enables a thinner wall construction and results in an overall lightweight package. Note: GM 2.0 drag race arms are not compatible with factory coil springs and must be used with a coilover system.

5.0 out of 5 stars ( 2 )

$699.26

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$851.36

QA1 Diagonal Link Kits

QA1 diagonal link kits help streamline the fabrication process of building a drag race-style 4-link. Designed to be heavy-duty to handle the demands of high-performance racing, the kits offer high-quality, MIG-weldable components to ensure a safe, easy to install, and properly engineered product. QA1's diagonal link kits pair up great with their HD Pro rear 4-link systems, but can be easily adaptable into most drag race setups. Kit contents, features, and benefits: * 1 in. diameter x 40 in. length of tubing -- Can be cut to length to work in most setups -- 40 in. or narrower frame rails * Pre-bent and drilled mounting brackets -- Make installation into 1/2 in. trailing arm bolts a breeze * Grade 8 hardware * QA1 chromoly, high-misalignment rod ends -- Standard in strength and offer generous mounting flexibility

5.0 out of 5 stars ( 1 )

$116.96

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QA1 GM Street Control Arms

QA1's Street control arms use a factory replacement ball joint and polyurethane pivot bushings. These work great on vehicles used primarily for cruising and long distance events. Configured for QA1 Pro Coil Systems, these street control arms feature powdercoated tubular construction for increased strength and great looks. A bolt-in spring adapter is available separately to allow the control arms to be used with stock springs. All the upper arms feature an offset cross shaft letting you quickly and easily adjust camber.

4.69 out of 5 stars ( 13 )

$751.46

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$998.96

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QA1 Interchangeable Engine Mounts

QA1 interchangeable engine mounts allow you to use the engine of your choice. They are designed to be used with specific QA1 offerings, like their F-100 front coilover conversion systems and Mustang K-members. All brackets are made from strong steel and given a durable black finish.

4.33 out of 5 stars ( 6 )

$102.56

QA1 Universal Panhard Bar Kits

QA1 universal panhard bar kits offer a great solution for laterally locating your rear axle. These kits pair perfectly with QA1 DIY 4-Link systems, and can also be adapted into any vehicle requiring a panhard bar. They include a length of 1 1/4 in. diameter tubing that can be cut to length to work with most frame rail widths. An adjustable axle mount is included to be able to fine-tune mounting height and roll center; and weldable tabs are included to locate the other end to the frame rail. Tube adapters, hardware, and QA1 rod ends complete each kit and offer on-car adjustability for easy tuning. Fitment notes: * Welding required * Works with 3 in. axle tubes * 37 in. maximum installed length

5.0 out of 5 stars ( 1 )

$188.96

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ZyCoat ZyBar Thermal Coating

ZyCoat ZyBar thermal coating is a high temperature thermal dissipation coating for headers, manifolds, turbos, and exhaust systems. By greatly reducing radiant engine heat, ZyBar improves scavenging performance to boost torque and increase horsepower. Utilizing advanced, micro-surface technology, even a very thin .001 to .0012 mil coating of ZyBar outperforms conventional tapes, wraps, ceramic, or powder coatings. ZyBar's improved engine performance was confirmed by measuring header surface temperature reduction versus stock, uncoated headers. Utilizing revolutionary, lightweight micro-surface technology, ZyBar significantly reduces surface temperatures which, in turn, lowers under-the-hood temperatures, and lessens the need for heavy wraps, tapes and shields. Additional features of ZyCoat ZyBar thermal coating include: * Lower applied cost … less than 1/3 the cost of ceramic coating * Increased scavenging performance for increased engine performance * Color stability and corrosion resistance * Conquers temperature extremes up to 2000+ degrees F * Reduces radiant heat by over 90 percent * Accelerates thermal flow to increase horsepower * Resists rust and corrosion--won't chip or crack * Spray, dip, or wipe application * Choice of colors

3.53 out of 5 stars ( 15 )

$71.99

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$1,709.99

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Detroit Speed QUADRALink Anti-Roll Bars

Detroit Speed QUADRALink anti-roll bars are the perfect complement to your QUADRALink system. They provide an additional upgrade to your rear suspension for the ultimate in performance, without sacrificing ride quality! Detroit Speed QUADRALink roll bars are adjustable and include end links, bushings, mounting brackets, and split lock collars for installation.

5.0 out of 5 stars ( 1 )

$358.16

Detroit Speed Caster Camber Kits

Detroit Speed offers caster camber kits for a variety of applications, including more than a dozen Ford Mustang models from the 1980s and '90s. They give Fox Body owners precise control over suspension geometry, improving handling, tire wear, and overall performance. With independent caster and camber adjustment, each kit offers more tuning range than stock. Featuring Speed-LIGN technology, kits ensure accurate, repeatable adjustments without unwanted movement, keeping your alignment locked in for maximum stability and control. * PRECISION ADJUSTMENTS FOR BETTER HANDLING: Factory alignment adjustments are limited, but this kit provides greater tuning flexibility for street, track, or drag setups. Independent caster and camber control lets you dial in the perfect alignment for sharper turn-in, better tire wear, and improved stability. * SPEED-LIGN TECHNOLOGY FOR RELIABLE SETTINGS: Detroit Speed's Speed-LIGN system ensures precise, repeatable adjustments in 1/16 in. increments, eliminating slippage. Once set, your alignment stays locked, delivering consistent performance and tire longevity. * RIGID, HIGH-STRENGTH STRUT MOUNTING: The aircraft-grade monoball provides a solid, smooth connection between the strut and chassis for precise articulation and response. The anodized aluminum adjuster plate eliminates deflection, keeping the suspension stable under all conditions. * BOLT-ON INSTALLATION: This 100 percent bolt-on kit includes all necessary hardware for an easy install with no modifications required—ideal for street, track, or performance builds.

Not Yet Reviewed

$377.96

Detroit Speed Torque Boxes

Get a more stable ride by increasing the strength of your front-end with Detroit Speed high-quality steel torque boxes. An old or weak torque box can mean body flex or frame twisting, which can do serious damage to your vehicle. If you have a vintage car, built with a lighter chassis, it can be quite flexible when it comes to wavy road surfaces and potholes. It is often quite disconcerting to feel the body undulate across bumps. Whether you want to stabilize your older model car or replace an existing torque box, Detroit Speed manufactures automotive components and systems which deliver the late model vehicle ride and handling you can expect from a world-class automotive parts leader.

5.0 out of 5 stars ( 1 )

$213.26

Detroit Speed Weight Jack Lower Control Arm Kits

Detroit Speed Weight Jack lower control arm kits optimize suspension geometry, improving front-end stability and steering response. Designed as direct bolt-in, high performance upgrades, they replace stock control arms and front springs on specified vehicles, and include bushing spacers that allow for standard or forward mounting locations. Detroit Speed's Weight Jack system makes it easy to fine-tune ride height and corner balance without disassembling the suspension, and these lower control arm kits offer the perfect solution for street, autocross, and track-focused builds when using a strut-style suspension. Features and benefits: * Tubular lower control arms * SN95 Mustang ball joints and greaseable Delrin® bushings * Tight-profile design maximizes wheel and tire clearance at full steering lock, ensuring superior fitment for aggressive setups * 2.5 in. I.D. springs expand tuning flexibility for a variety of performance applications * 700 lb./in. spring offers an ideal balance of comfort and performance * Forward mounting position increases caster for improved high-speed stability and steering feel, making it a valuable upgrade for performance-driven builds

Not Yet Reviewed

$1,181.66

Detroit Speed Lowering Hubpack Uprights

Detroit Speed offers lowering hubpack uprights for a variety of application, including many Ford and Mercury cars from the 1970s, '80s, and '90s. They upgrade the Fox Body platform with modern handling, braking, and steering performance. Designed for premium builders, fabricators, and enthusiasts, these forged aluminum uprights provide a 2 in. drop, optimized suspension geometry, and compatibility with S550 Mustang brake systems. These kits deliver superior stability, precise steering response, and the durability needed for high-performance applications. * LOWER, STRONGER, AND MORE CAPABLE: Built-in 2 in. lowering improves stance while enhancing cornering ability and weight distribution. The forged aluminum construction ensures strength and rigidity, eliminating deflection for sharper handling. This design allows for greater confidence in aggressive driving and track conditions. * SUPERIOR BRAKING and STEERING RESPONSE: These uprights support S550 Mustang OE and aftermarket brake systems, delivering modern stopping power with increased pad and rotor options. The hubpack bearing system eliminates spindle pin flex, allowing for later, more controlled braking. Optimized Ackermann and bump steer geometry reduce unwanted toe changes, giving precise turn-in and high-speed stability. * EASY, BOLT-IN INSTALLATION: This bolt-on system includes all necessary mounting hardware, making installation seamless for performance-focused builders and fabricators. Designed for track, street, and autocross applications, it's a game-changing upgrade for serious Fox Body enthusiasts. * FEATURES AND BENEFITS: -- 2 in. drop-forged aluminum uprights for enhanced geometry and stance -- Optimized Ackermann and bump steer geometry for sharper, more responsive steering -- Hubpack bearing system eliminates spindle pin flex and reduces maintenance -- S550 brake mounting compatibility for superior OE and aftermarket braking options -- Utilizes stronger SN95 ball joint for improved durability and handling precision

Not Yet Reviewed

$1,228.46

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QA1 GM 2.0 Street Control Arms

QA1 GM 2.0 Street control arms provide increased positive caster compared to OE arms and are among the lightest available. These arms feature a lower unsprung weight and improved performance without sacrificing durability. Each arm includes a QA1 integrated ball joint design which is stronger than OEM and rebuildable for tunability, providing long-term reliable service. These arms are designed with billet cross shafts for reduced weight and durability for the long haul. Double-sheer lower mounts are coil-over ready for a clean installation. QA1 GM 2.0 Street control arms look incredible and use no unsightly additional adapters! Form meets function with these newly designed arms that look and perform great without requiring painstaking restoring like factory stamped steel control arms.

4.7 out of 5 stars ( 23 )

$769.46

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QA1 GM Street Performance Control Arms

QA1 offers their street performance control arms as the lightest, strongest, and best-looking control arms available for your GM ride. Polyurethane bushings isolate road noise for a smooth ride while simultaneously reducing bind for improved handling. Long-term strength and durability come from QA1's maintenance-free ball joints (pre-installed in every arm.) QA1 GM street performance control arms will ride better, corner harder, and launch faster than anything you've experienced in the past!

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$572.36

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$868.46