1999-04 Cobra Mustang, Bilstein HD series IRS shock, with dust boot and progressive bumpstops.
For more details and technical information, scroll down.
|Heavy Duty (HD) Bilstein Spring Recommendations|
|Conventional Spring Sets||MM Road & Track
H&R Super Sport
|Coil-Over Spring Rates|
|IRS Rear Springs||475 - 525 lb/in|
Heavy Duty (HD) Bilsteins work very well in street applications with a variety of both conventional springs and coil-over conversions. They are designed to deliver the best possible ride quality coupled with impressive street performance. The HD series dampers were not designed for use with overly aggressive spring rates, particularly in coil-over conversions. For dampers more suited to aggressive spring rates, see the MM Sport series and MM Race series dampers.
The HD series rear shocks must have a groove machined in the shock housing to accept the MM rear coil-over conversion kit. To obtain grooved shocks, either order package number BIL-9.1, or rear shocks part number GBE5-2959-H0.
While they are non-adjustable, Bilstein's unique deflective-disc valve design instantaneously self-adjusts to changing road surfaces. Their performance does not degrade with age, usage, or heat, requiring no compensating manual adjustments as with other brands. Bilstein uses a patented mono-tube design that allows for a larger piston size than is possible with a twin-tube damper. The mono-tube design provides better heat dissipation to keep the damper's oil cooler, and decreases heat-induced damper fade. High-pressure nitrogen gas prevents oil foaming and fading. Every Bilstein damper is tested on a shock dyno before leaving the factory to ensure quality.
All Bilstein struts and shocks include dustcovers suitable for use with conventional springs.