Version DR Drag Race series referenceSpecial order · Estimated lead time: typically 2-3 weeks
86-91 Mazda RX-7 - Version DR Drag Race Coilovers
Choose year, make and model to confirm this application-specific product fits — you can add it to your cart either way.
Verify fitment- Four assembled coilovers, sprung and valved for this application
- Upper mounts (pillowball with camber adjustment on MacPherson-strut fronts)
- Damping adjustment knobs and spanner wrenches
- Front and rear springs rated 8.7 kg/mm front and 5.3 kg/mm rear
Approved application: 1986–1991 Mazda RX-7 · FC
- Ships from Mesa, AZ
- 12-month limited warranty
- Special order: typically 2-3 weeks
Specifications — CMZ140-DR
Product details
The Version DR Drag Race Mazda RX-7 Coilovers are the ultimate in suspension technology for serious drag racing enthusiasts and professionals. These Drag Racing Coilovers are built off our race proven Version RR Road Race Coilovers with internal changes to accommodate the rigors of drag racing. All Version DR kits are custom valved for drag racing with appropriate spring rates chosen to maximize traction and regulate weight transfer. With proven performance on the drag strip, the Ksport Version DR Drag Race Coilover Kit will reduce Elapsed Time and 60 Ft times making it the ideal suspension system for serious drag race vehicles.
Features:
Spring Rates and Shock Valving Specific for Drag Racing
Carefully chosen spring rates and shock valving optimize weight transfer while launching. Each kit is designed specifically for FWD, RWD or AWD vehicles. Not intended for daily driving use.
36-Way Adjustable Damping
Featuring 36 levels of damping adjustment these Drag Race coilovers allow you to perfectly dial in your system for both handling and comfort. In addition, the damping adjustment alters compression and rebound simultaneously for more effective and user-friendly setup changes.
Aerospace Quality Aluminum Components
Most pieces in our Coilover systems, including mounts, collars and spring perches, are designed from 6061-T6 Billet Aluminum resulting in lightweight, durable and rust resistant components. Steel shock bodies are electroplated with Zinc to resist rust and protect from the elements. In addition, kits include an anti-rust paste packet that can be applied to key areas of the coilover for added protection.
Adjustable Spring Perch for Height Adjustment
Most applications utilize an adjustable lower mount which means height adjustability without losing suspension travel. Users can easily achieve desired ride height without worrying about bottoming out the shock. For vehicles with a separate rear shock and spring, or a “hi-low kit”, height adjustment is available via the spring perch and the lower mount of the shock. This allows vehicles with this set up to still go as low, if not lower, than true coilovers.
Adjustable Lower Mount Allowing Maximum Suspension Travel
Most of our coilovers feature the ability to adjust your ride height without affecting the shock and spring travel. This way you can set your desired ride height without having to worry about bottoming out the shock.
Camber Adjustment on Many Models
Many of our applications that have pillowball upper mounts also have camber adjustability. This is extremely helpful when you need to dial in your camber for vehicle alignment purposes. This also eliminates the need for a separate camber kit. *Note: Camber adjustment is not available on all models with pillowball upper mounts.
Pillowball Top Mount for Increased Steering Feel
Many of our applications for vehicles with MacPherson type suspension will have pillowball upper mounts. Our patented new bearing design helps combat noise while turning unlike many other coilovers on the market. Steering feel and response is improved with pillowball upper mounts.
Monotube High Pressure Design Reduces Oil Leakage
The Ksport DR Drag Race Coilover systems utilize a Monotube design, with oil and gas separated within the cylinder. When compared to twin tube construction, the Monotube design dissipates heat faster and more evenly and allows for finer damping adjustments. Aeration and cavitation issues are a lot less common in a Monotube design, resulting in a more consistent ride quality.
Advanced Pillowball Mounts
Standard issue on MacPherson type vehicles are our advanced pillowball mounts which allow camber and caster adjustment for fine tuning your alignment specs. These mounts allow for both camber and caster adjustment for the ability to dial in your suspension geometry to your needs. These mounts replace the stock rubber or plastic mounts to reduce flex and improve performance. The angle of the contact patch of the tire is changed improving handling when installed on the coilover. *Note: Not all pillowball mounts offer camber/camber adjustment.
Dust Boot to Protect Damper Seal
Dust boots are standard on all coilovers. We also integrate the bump stop inside the dust boot. This is more efficient and is less likely to crumble to pieces and deteriorate like other designs.
12 Month Limited Warranty
Ksport Version DR Drag Race coilovers come standard with a 12-month warranty which covers manufacturer defects.
Easy Installation
The Ksport Version DR Drag Race system has been carefully designed to ensure a hassle-free installation process. A specialized team of engineer’s test fitment, clearance, ride height and more to ensure the perfect application for your vehicle. View Installation Instructions.
Specifications
| Brand | Ksport |
|---|---|
| Manufacturer | Ksport |
| Bolt-On | Yes |
| MPN | CMZ140-DR |
| Spring Rate Front | 8.7 kg/mm |
| Spring Rate Rear | 5.3 kg/mm |
| Top Mount Front | Pillowball Mount with camber adjustment |
| Top Mount Rear | Aluminum Mount no camber adjustment |
Supported features
Custom valved for drag racing with spring rates chosen to maximize traction and regulate weight transfer.
36 levels of damping adjustment. Set full soft for a comfortable cruising setting between passes.
Many MacPherson applications have pillowball upper mounts; the patented bearing design combats noise and improves steering feel and response.
Most applications adjust ride height without affecting shock and spring travel.
Oil and gas stay separated within the cylinder for faster heat dissipation, finer damping adjustment, and consistent behavior pass after pass.
Mounts, collars, and spring perches are machined from 6061-T6 billet aluminum; steel shock bodies are zinc-plated for added protection from corrosion.
Application details
Installation
Set ride height with the adjustable lower mount where the application has one; use the spring perch only where the application-specific layout has no adjustable lower mount. Lock every collar with both spanner wrenches. Start damping 18 clicks counterclockwise from full stiff and adjust from there. Professional setup and alignment are required after installation; on MacPherson fronts, establish baseline camber at the elongated lower-mount hole before fine adjustment at the upper plate.
Coilover setup, height and damping guidesWarranty & service
12-month limited warranty to the original purchaser against defects in materials and workmanship. Racing use, exterior finish and improperly installed or modified parts are not covered; keep your original invoice for any claim. KSport coilovers are rebuildable; replacement shocks, springs, mounts and hardware are sold individually.
Warranty terms and service requests