- Silent Hi-Power "cat back" exhaust systems offer high performance and sporty appearance with the added benefit of reduced noise levels making it the best choice for more mature enthusiasts. 
- Silent Hi-Power mufflers are constructed entirely of SUS304 grade stainless steel for high lustre, long lasting performance.
-HKS has introduced the "Silent Chamber" which removes a lot of the lower frequency noise that can often be heard into the cabin even when cruising. 
- The silent chamber removes this uncomfortable noise but due to its closed end design, only a minimal amount of exhaust gas flows into it, meaning that the disruption to exhaust gas flow through the entire system is minimised and there is no harm to performance.
Fitment:
Make: Mazda
Model: RX7 FD3S Twin Turbo
Year: 1992-2002