HKS I/C PIPING KIT FL513002 AH002 PIPING KIT for CIVIC TYPE R FL5 Features Piping Kit Upon enlarging the pipe diameter and smoothing out the inner design in comparison to OEM we are able to increase power output. The OEM hose is prone to expand under high boost, but aluminum pipe has completely solved the issue of pressure loss due to hose expansion. The aluminum pipe is given a mirror buff finish, and the cast pipe and core feature the HKS logo, which gives a fantastic