Unknown Performance O2 Dump pipe vent to atmosphere aka screamer for Mitsubishi Lancer Evolution 7/8/9 will increase exhaust flow straight out of the turbo increasing gains in both torque and power for your 4G63.
For those that want to be loud and want attention, the screamer pipe will give you that sound that external wastegate setups give you while using internal/stock actuator turbo setup. Our O2 Dump pipe are manufactured to the highest quality, ported and polish on the inside for a contoured finish on the inside for a smoother flow, external brushed finish for the nicest quality piece.
Manufactured from S304 stainless mandrel piping, precision TIG welded, and brushed finish, combination will bolt up directly to the stock/stock frame turbo. Please note that this part will not fit ALL front pipes. It will fit most stock style front pipes that will bolt onto the stock dump pipe. With the vent pipe being fairly tight, air conditioner lines will be needed to be tucked away, and a aftermarket lower intercooler piping is recommended but not necessary.
Included laser cut gasket for perfect seal.
Vehicle: Mitsubishi Evolution 7/8/9 CT9A