Invidia Lower Catted Downpipe with Twin 02 Bung for Subaru WRX/STI/Legacy GT (HS08SW1DOCB) 1442 The Stage 2 Si Cold

The Stage 2 Si Cold Air Intake System is for those who want a substantial performance gain with less intake noise and a stock appearance

2L V8 Auto/ Manual Trans

Injen's EVO8101C comes with all necessary hardware to provide a simple and fast installation

When the X-connection valve is open

Built from aviation-grade carbon fiber raw material

Invidia Lower Catted Downpipe with Twin 02 Bung for Subaru WRX/STI/Legacy GT (HS08SW1DOCB) 1442 The Stage 2 Si ColdHere, you are looking at the Invidia Lower Downpipe. This is a catted downpipe that features a divorced wastegate flange and includes 2 O2 sensor bungs for your factory O2 setup, as well as an aftermarket wideband. This is a direct replacement for your factory restrictive downpipe designed to greatly reduce back pressure and turbulence. The result is improved horsepower and torque, along with reduced turbo lag for an improved throttle response.