APEX'i 70mm butterfly exhaust control valve. Cable control with locking handle button to control the butterfly door. 2 bolt flange type, can be bolted behind the catalytic converter (or test pipe)to reduce the noise level by closing off the butterfly valve. One should not boost high when closing off the butterfly valve due to exhaust restriction. It is only use to reduce the noise level when you are driving normally on the street.This item is non application specific. Please verify compatibility before purchase. May require some modification for proper installation.