Kelford Beehive Spring and Base Mitsubishi 4G63 cusco Symmetrical 4-1 design maintains consistent

Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise

feed the voltage from the Civic's front O2 sensor into the K-Pro's rear O2 sensor input

The exquisite Akrapovič Evolution Line (Titanium) exhaust system adds performance and style

cotton gauze air filter provides maximum flow for increased horsepower and torque

Kelford Beehive Spring and Base Mitsubishi 4G63 cusco Symmetrical 4-1 design maintains consistentMITSUBISHI 4G63 DOHC EVO 8 9. High Performance PACALOY Beehive spring to suit stock retainers. Suits high RPM, high boost competition engines. Install at 90lb. Maximum valve lift is 13. 50mm.