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SKU: M911PR | UPC: 806990154217
QA1 MOD Series Piggyback Coil-Over Shock Absorber - Right Hand Bearing Mount
The QA1 M911PR MOD Series Piggyback Coil-Over Shock Absorber is the ultimate tunable performance shock for custom and high-performance vehicle builds requiring precise damping control, adjustability, and superior heat management. Featuring 4-way adjustable high/low-speed compression and rebound with QuickTune modular valve packs, this double-adjustable shock allows fully independent tuning of compression and rebound characteristics – delivering an expansive force curve and unmatched tunability. With a piggyback nitrogen-charged canister, sealed pivot bushings, indexable base eyelet, and 100% dyno-tested construction, the MOD Series is ideal for street, drag, road racing, or off-road applications demanding maximum performance and reliability.
Key Features
- 4-Way Adjustable Damping: Independent high/low-speed compression and rebound adjustment for precise tuning
- QuickTune Technology: Dry modular valve packs swap easily without opening the shock or risking contamination
- Piggyback Reservoir: Nitrogen-charged for increased oil capacity, superior heat dissipation, and consistent performance
- Double-Adjustable Design: Wide range of low-speed bleed adjustment for fine-tuned control over compression and rebound
- Indexable Base Eyelet: Reattach at desired angle for optimal shock and reservoir placement
- 100% Dyno Tested & Serialized: Proudly made in QA1's Lakeville, MN facility – every shock verified for performance
Specifications
| Specification | Detail |
|---|---|
| Part Number | M911PR |
| Configuration | Piggyback Reservoir – Right Hand |
| Mount Type | Bearing Mount |
| Collapsed Length | 14.875 inches |
| Extended Length | 23.625 inches |
| Internal Design | Dual Tube |
| Adjustability | 4-Way (High/Low-Speed Compression & Rebound) |
| Finish | Black |
| Material | Aluminum Cylinder |
| Coil-Over | Yes (Coil Spring Not Included) |
| Country of Origin | United States |
| Warranty | Limited Lifetime (QA1) |
Product Notes
- Right-hand piggyback configuration – ideal for custom coil-over setups with adjustable valving
- Valve packs can be swapped quickly for tuning – supports soft/firm compression and rebound options
- Designed for applications requiring 14.875" collapsed / 23.625" extended length – verify fitment
Installation Notes
- Estimated time: 2-4 hours per shock, advanced difficulty, professional installation recommended
- Requires coil-over setup, proper valving selection, and precise mounting – torque to spec
- Full alignment and suspension tuning advised after installation
This Part Fits
| Application | Notes |
|---|---|
| Custom Coil-Over Builds | Performance Vehicles Requiring Adjustable Piggyback Shocks (14.875"/23.625") |
| Common | Street, Drag, Road Racing, Off-Road Applications |
Why Choose QA1 MOD Series Piggyback Shocks?
- 4-way adjustability and QuickTune valve packs offer unmatched tunability and performance
- Piggyback reservoir ensures consistent damping under extreme heat and load
- Made in USA with dyno-tested, serialized quality – trusted in racing and high-performance builds
Frequently Asked Questions
-
Q: Can I adjust the valving on this shock?
A: Yes, 4-way adjustable high/low-speed compression and rebound; modular valve packs allow easy swaps. -
Q: Does it include a coil spring?
A: No, coil-over shock body only; pair with compatible QA1 springs for your setup. -
Q: Is professional installation required?
A: Recommended requires precise valving, mounting, and suspension tuning. -
Q: What applications is this shock suited for?
A: Custom coil-over builds needing adjustable damping, heat management, and 14.875"/23.625" length.
Shipping & Handling
- Method: UPS/FedEx Ground (Oversize)
- Availability: In stock - ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 9.5 lbs
QA1
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