HKS Sport Exhaust Systems are designed to reduce backpressure and increase exhaust flow for greater peak power and a broader torque band. Each Sport Exhaust application utilizes a specific muffler design and shape along with the appropriate piping diameter to maintain low-end torque while maximizing high-end horsepower for your 1988-1991 Honda Civic Hatchback Si.

Piping diameter- 50mm
Tip- 60mm
Tip Style- R-2