QA1 289-DRY 28A Series Steel Monotube Shock, 23.9/14.9 Ext/Comp
Dirt Late Model, Modified, Mono Tube Shock Type, Steel Shock Body Material
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
The 28 Series shock is an expanded gas chamber shock that performs well in various track conditions. The expanded gas chamber allows the shock to provide less rod force buildup, giving the driver more feedback compared to a standard monotube shock. The 28 Series is a popular choice for modifieds, late models, super stocks and various other classes. Works best on dry to slightly rough dirt tracks and smooth asphalt tracks.
- 2" O.D. zinc plated steel monotube body
- Expanded gas chamber for increased feel, traction and performance
- Deflective disc valving
- Linear, digressive or super low digressive valving available
- Premium proprietary blend of specially engineered oil to prevent fade
- Racer rebuildable and revalveable for unparalleled repeatability
- Custom valving available
- 100% Dyno tested and serialized
- Made in the USA
Hyperscrew vs. Sealed Hyperscrew (IMCA legal) vs. Schrader Valve
Hyperscrew (28 Series) The hyperscrew equipped shocks have a threaded round port near the bearing end of the shock body. This hole is then sealed with a small screw that has an O-ring built into it, sealing the nitrogen gas pressure inside the shock.
Sealed Hyperscrew (28A Series)
The 28A Series shocks feature a sealed hyperscrew. The gas pressure of these shocks is only adjustable by QA1 and QA1 Authorized Rebuilders per sanctioning body, like IMCA, and track rules.
Schrader Valve (28V Series)
With a Schrader valve you can easily adjust your gas pressure. Much like adding air to your car tires, the Schrader valve allows you to make "on the fly" gas pressure adjustments between heat races and features to adjust for varying track conditions.
More Like This
QA1 28A Series Steel Pressurized Gas Monotube Shock, IMCA Approved
QA1 7554 55 Series Small Body Shock-5 In Stroke, Comp 4/Reb 4
QA1 FC Series Custom Valve GM Fullsize Stock Mount Front Steel Shock
QA1 5579-1 55 Series Steel Replaceable Bearing Shock, 9/1 Comp/Reb
QA1 7543 55 Series Small Body Shock-4 In Stroke, Comp 3/Reb 3
QA1 7551 55 Series Small Body Shock-5 In Stroke, Comp 1/Reb 1
QA1 7553 55 Series Small Body Shock-5 In Stroke, Comp 3/Reb 3
QA1 7561 55 Series Small Body Shock-6 In Stroke, Comp 1/Reb 1
QA1 7562 55 Series Small Body Shock-6 In Stroke, Comp 2/Reb 2
QA1 7563 55 Series Small Body Shock-6 In Stroke, Comp 3/Reb 3
Q & A
Tim talks about what options we have for hot rod shocks.
Speedway Motors employee Pat O. talks about shock ends.
Call Our Experienced Shock Techs For Details At 800.979.0122. Shipping Information ... Have Your Shocks Dyno Tested To Ensure Optimum Performance!
How to remove shock rod end and install bump rubber/bump cup.
AccuAir and Speedway Motors team up to bring you a video series explaining the basics of air suspension. Watch these videos to get a better understanding of air suspension.