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• QA1’s patented Ultimate Ball Joints are 100% owner rebuildable
• Adjustment tool kit includes spanner socket & Allen hex key

** On Sale While Supplies Last **

The best keep getting better! We've taken your feedback, added new technology and developed an improved 50 Series shock absorber - the 51 Series. QA1’s 51 Series features a brand new in-house machined body, which has a large inside diameter for easy installation of gas bags. The 51 Series is the premium twin tube choice for dirt and asphalt modifieds, late models and super stocks.

• Available in seven and nine inch strokes
• Racer revalveable & rebuildable
• Twin Tube Shock Absorber features hard anodized internals
• Steel Large Body style
• Zero gas pressure design provides great grip on slick tracks and an outstanding feel
• Premium Aluminum piston - dual bleed circuits for standard or custom valvings
• Premium proprietary blend of specially engineered oil prevents fading
• 15mm centerless ground, hard chrome plated, solid piston rod
• Deflective disk valving allows control of suspension at low shaft speeds without creating extreme forces at high shaft velocities
• Can run upside down with no rate change to reduce unsprung weight
• Replaceable 1/2" I.D. bearings
• 100% Dyno tested & serialized

Additional Piston Option: QA1 also offers a brand new high-flow linear two port piston for the 51 Series as an additional accessory. This two port piston design allows the valve discs to open consistently which results in a smoother force curve and accommodates independent compression and rebound bleed circuits for precision low-speed force control.

QA1's brand new 27 Series shocks feature easy, bolt-in installation and are available in all popular stock mount options for multiple classes of racing. Made in the USA, these shocks feature an electroless nickel plated body that completely seals out elements, providing excellent corrosion resistance, superior hardness and lubricity. The 27 Series is completely racer rebuildable and revalveable meaning there’s no need to throw this shock away. The 27 Series features QA1’s deflective disc technology, allowing racers to easily change their valve settings to suit specific driving and handling needs.

• Electroless Nickel Plated Body
• Stock Mount
• Hyperscrew - threaded round port near bearing end of shock body is sealed with small screw
• Deflective Disc Valving - damping curve allows for complete control at low shaft speeds without creating extreme forces at high shaft velocities
• Linear Valving provides a more stable car and allows the driver to feel the car better
• Premium proprietary blend of specially engineered oil to prevent fade
• Racer Revalveable and Rebuildable - Designed for unparalleled repeatability
• 100% Dyno Tested & Serialized
• Made in the USA

• QA1 Lower Shock Bolt Kit
• Use to eliminate or minimize vehicle modifications
• Use with the following part numbers: TD403, TS403, TR403, TD504, TS504, TD703, TS703, TD801, TS801, TD802, TS802, TD901, TS901, TD902, TS902
• Each of these shocks, except for the TD901 and TS901, requires a bushing (part #9032-102) to use the Lower Shock Bolt Kit

• QA1 5 WT Lightweight Shock Oil
• Specially formulated for use with performance racing shocks with deflective disc valving
• Anti-foam, anti-fade formula
• 1 Gallon container with handle

• QA1 Rear trailing arm hardware kit
• Fits 1964-72 GM A-Body
• These kits replace factory hardware with new bolts, A/N washers and nylock nuts

• 5Q Series 2-1/16" diameter steel twin tube 9" stock mount front shock (formerly 53 Series)
• Can be re-valved and rebuilt in a matter of minutes using basic tools
• 2-piece bodies make it simple to disassemble and reassemble shocks
• Gland features relief cuts and a hyper screw port, making shocks easy to fill and bleed on assembly
• Seal kit minimizes leaks, especially in high-rebound applications
• Compression tube uses a slip fit design to simplify the rebuild process
• Laser-engraved, black-anodized closure nut to make serial numbers and valving easy to read
• Body Finish: Black zinc
• Threaded Body: No
• Piston: Linear or Linear Digressive
• Base Valve: Yes
• Gas Charged: No
• Applications: Street Stock, Hobby Stock, B-Mod/Sport Mod, Modified

• 5Q Series 2-1/16" diameter steel twin tube 5" or 6" stock mount rear shock (formerly 53 Series)
• Can be re-valved and rebuilt in a matter of minutes using basic tools
• 2-piece bodies make it simple to disassemble and reassemble shocks
• Gland features relief cuts and a hyper screw port, making shocks easy to fill and bleed on assembly
• Seal kit minimizes leaks, especially in high-rebound applications
• Compression tube uses a slip fit design to simplify the rebuild process
• Laser-engraved, black-anodized closure nut to make serial numbers and valving easy to read
• Body Finish: Black zinc
• Threaded Body: No
• Piston: Linear or Linear Digressive
• Base Valve: Yes
• Gas Charged: No
• Applications: Street Stock, Hobby Stock, B-Mod/Sport Mod, Modified

• 5Q Series 2-1/16" diameter steel twin tube 7" or 9" bearing mount rebound adjustable shock (formerly 51 Series)
• Can be re-valved and rebuilt in a matter of minutes using basic tools
• 2-piece bodies make it simple to disassemble and reassemble shocks
• Gland features relief cuts and a hyper screw port, making shocks easy to fill and bleed on assembly
• Seal kit minimizes leaks, especially in high-rebound applications
• Compression tube uses a slip fit design to simplify the rebuild process
• Laser-engraved, black-anodized closure nut to make serial numbers and valving easy to read
• Body Finish: Black zinc
• Threaded Body: No
• Piston: Linear or Linear Digressive
• Base Valve: Yes
• Gas Charged: No
• Coil-Over Compatible - available separately
• Applications: Street Stock, Hobby Stock, B-Mod/Sport Mod, Modified