Lachute Performance Catted Downpipe (08-14 WRX & 08-21 STI)
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304 stainless steel construction
Larger piping diameter
Smooth bends
Designed with a high-flow catalytic converter
Designed with an additional O2 bung for a wideband O2 sensor
Improves throttle response
Increases both horsepower and torque
Reduces turbo lag
A tune or ECU recalibration is always recommended with any aftermarket downpipe
