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QA1 Pro coilover systems are engineered from the ground up to offer unmatched performance over stock suspension setups. Pro coilover systems utilize adjustable and non-adjustable coilover shocks and springs designed specifically for replacing the factory shocks and springs. This combination offers ride height adjustment and variable position valving adjustment (where applicable) for performance not found in other kits. Choose QA1 Pro coilover systems for your next suspension upgrade.
( 343 )
$652.75
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$677.94
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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.
( 22 )
$572.36
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$769.46
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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!
( 104 )
$752.36
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$798.26
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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GM enthusiasts, QA1 GM 2.0 pro-touring control arms are a simple upgrade over original suspension or worn and outdated tubular control arms.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.
( 14 )
$665.96
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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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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.
( 138 )
$577.76
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$662.36
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Mahle PowerPak Piston Kits and ring kits include forged pistons with steel pins, and wire locks—all in one race-proven package. The pistons are hand-deburred and then coated with dry phosphate to protect against ring micro-welding and pin galling during initial startup. For additional performance, Mahle added its proprietary Grafal anti-friction coating to the piston skirts. These replacement packages are available in a wide variety of size options for fitment with specific engines.
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$530.57
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$812.59
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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.
( 2 )
$699.26
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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.
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$751.46
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$769.46
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Upgrade from stamped steel and rubber bushings with QA1 tubular control arms. Stronger and lighter, they are constructed of tubular steel, powdercoated, and fitted with polyurethane bushings. Their upper control arms will increase caster by approximately 3 degrees for better straight line stability and include ball joints. The lower control arms feature sway bar tabs and include bushings, pivot arms, and nuts for a no-hassle install. Improve the performance of your muscle car with QA1 tubular control arms.
( 1 )
$548.96
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Using only three parts (a laser-welded sealed housing, an internal inertia ring, and highly viscous silicone fluid between the two), SFI-approved Fluidampr harmonic dampers can control all crankshaft vibration--not just a limited frequency range. As a result, you get reduced wear on the main bearings and timing gear, more stable valvetrain operation, and less chance of crank failure.
( 143 )
$503.00
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Mahle PowerPak piston and ring kits include forged pistons, low-drag rings, steel pins, and wire locks—all in one race-proven package. The pistons are hand-deburred and then coated with dry phosphate to protect against ring micro-welding and pin galling during initial startup. For additional performance, Mahle added its proprietary Grafal anti-friction coating to the piston skirts. These replacement packages are available in a wide variety of size options for fitment with specific engines and pistons.
( 22 )
$667.06
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$823.72
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PowerStop is on a mission to deliver an easy and affordable way for any driver to upgrade their brakes--no matter where or how they use their vehicle. Forget standard, off-the-shelf parts. PowerSport Z23 Evolution Sport brake disc and drum upgrade kits come with everything you need--pads, rotors, brake drums and shoes, plus the hardware necessary for an easy, bolt-on upgrade for your daily driver. Along with increased braking power offered from the Z23 carbon fiber ceramic brake pads, they also feature a low-dust formula to keep those wheels looking great while you say goodbye to nasty brake dust. The pads combine with drilled, slotted, and zinc plated rotors to ensure a cool, smooth ride that protects against rust and corrosion. Evolution premium coated brake drums come with brake shoes, a spring/hold-down kit, and adjusters (where available). Give your daily driver the performance upgrade it deserves with the Z23 Evolution Sport disc/drum upgrade kits.
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$525.95
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$575.85
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Mahle Wissota PowerPak Plus piston and ring kits are power-packed packages for dirt track racers. They're hand-deburred, forged aluminum pistons fully machined and feature a phosphate dry lubricant coating. The lightweight slipper skirt forgings are given Mahle's Grafal anti-friction coating to reduce drag. PowerPak Plus kits also feature CNC-finished pin bores, high-strength steel pins, race-proven round wire locks, and include their low-drag ring pack. Fit your high-rpm dirt track race car with low-drag pistons and rings made especially for your year/make and engine application.
( 1 )
$685.94
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Heidts dropped steel spindles are full-steel, just like the factory spindles. They're much stronger than cast iron and will use your stock steering arms with no loss of turning radius. No realignment is required. These spindles are available for a variety of applications.
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$521.10
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$535.50
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What kind of power are you packing? Mahle PowerPak Plus piston and ring kits possess the attributes that you seek for the competitive edge that you want. Built from forged aluminum, these PowerPak pistons are hand-deburred and phosphate coated and then given Mahle's proprietary Grafal anti-friction coating. The lightweight kits also include low-drag slipper skirts, CNC-machined pin bores, machined ultra-flat ring grooves, and Mahle low-drag rings. These power-packed, race-proven packages provide you with unmatched consistency and performance. What separates you from the competition? It's the fact that you've chosen the power of Mahle PowerPak Plus piston and ring kits.
( 5 )
$747.99
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$831.99
On Sale
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These Summit Racing™ harmonic balancer and flexplate Pro Packs are a great way to finish off your engine rebuilding project. They feature our Street & Strip flexplate and include a new performance balancer and bolts all in one affordable package.
( 10 )
$650.97
$625.97
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Heidts offers these front disc brake kits for several applications. They're available to update early stock spindle disc brake kits and are designed for use with Heidts Superide suspension systems. They are constructed with top-quality rotors and calipers in a variety of configurations for the ultimate in braking performance.
( 2 )
$504.90
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As part of the number one choice for custom suspension systems, QA1 Proma Star single adjustable coilover systems are available in several lengths, making them easy to fit in almost any situation. Both the double-adjustable versions and these single-adjustable models allow you to set your valving to fit your driving style, so you are ready to hit the road, nearest racetrack, or anywhere in between. Get that perfect stance with adjustable ride height when you order the QA1 Proma Star single adjustable coilover systems best suited for your application. Other product features include: * On-the-car adjustable valving makes it quick and easy to dial in your desired level of comfort and performance * Shocks feature a 2 in. body diameter and can be mounted in any orientation * Spring mounting hardware designed for coil springs with a 2 1/2 in. inside diameter * Alternative mounting options available to fit your custom chassis * 100-percent dyno tested and serialized * QA1 single-adjustable shocks are designed for performance street driving, autocross, and lower-powered drag racing (rear only) * All QA1 single-adjustable shocks feature simultaneous compression and rebound adjustment on one knob (18 positions)
( 2 )
$798.26
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Make your IFS stock upgrade a natural conversion with Heidts Mustang II crossmember kits. They are precut and pre-fitted, so you'll have no measuring, no grinding, no trimming, and no mistakes! Heidts crossmember kits are ready to install when you are. Main crossmembers are constructed from only two formed pieces for maximum strength with an accurate fit and feature the strong design of vertical inner uprights offering twice the weld area to keep your frame from twisting. Crossmembers and spring towers with built-in anti-dive are pre-welded to fit your frame and one-piece shock cups are TIG-welded in place. Kit components may vary by application, but most include all of the special, hard-to-make brackets and mounts that you need to complete the install. Heidts kits retain the original suspension to give you the correct design, correct camber action, and no bump steer! Everything is pretty much done but the installation--that, you'll have to do yourself! But never fear--Heidts Mustang II crossmembers include a step-by-step, fully-illustrated instruction book to walk you through your install.
( 8 )
$531.90
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Mahle Motorsports offers several Pro series pistons that are designed for professional, oval, dirt, track, and drag racing. Mahle Motorsports machines the correct valve reliefs, dome profiles, and ring grooves for competition. The pins are fitted with the proper clearances and have a factory-applied phosphate and Grafal skirt coating, eliminating the expense and uncertainty of aftermarket coatings. Every piston is hand-deburred and inspected to ensure quality and performance.
( 1 )
$530.57
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Mahle PowerPak pistons are forged pistons with steel pins and wire locks. The pistons are hand-deburred and then coated with dry phosphate to protect against ring micro-welding and pin galling during initial startup. For additional performance, Mahle added its proprietary Grafal anti-friction coating to the piston skirts. Part numbers with T on the end have a cutting edge ceramic-based thermic barrier. The barrier is resistant to thermal shock, insulates the piston crown, and reduces heat transfer to increase performance. These replacement pistons are available in a wide variety of size options for fitment with specific engines and pistons.
( 2 )
$530.57
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Heidts has stabilizer bars for the front and rear of your hot rod and muscle car applications. Constructed from heat-treated steel, these anti-sway bars will help make your ride more stable and combat body roll. You'll feel more in control and enjoy your drive more. Keep the contact between your tires and the winding roads more level with Heidts stabilizer bars.
( 22 )
$594.00
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$645.30
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