The PERRIN™ up-pipe replaces the factory exhaust pipe connecting the exhaust manifold to the turbo charger.

The factory up-pipe hinders engine performance because the design includes a restrictive catalytic converter and a corrugated expansion joint. Replacing the factory up-pipe with a PERRIN Performance™ up-pipe will increase exhaust flow rates and spool the turbo faster providing more horsepower at a lower RPM.

Failures of the factory up-pipe are common on heavily modified Subaru's. Damage from pieces of the catalytic converter and the e.g.t. sensor probe being ingested into the turbo can occur.

The PERRIN Performance™ up-pipe is fully constructed of mandrel bent stainless steel. We have chosen to move beyond 304 to 321 stainless for its high strength rating under extreme temperatures and resistance to weld failures. The up-pipe is one of the hottest components of the exhaust system and 321 stainless will ensure the extra longevity of your up-pipe. The PERRIN 1/2" flange design prevents warping at high temperatures and insures a leak free seal.

The proper inside diameter of 1.62 inches is critical. Pre-turbo exhaust velocity is critical to boost response. Improperly oversized header and up-pipe systems lower exhaust velocities slowing spool up for larger turbo's decreasing power and increasing boost lag.

The PERRIN Performance™ up-pipe is specifically engineered with no provisional bung for the factory EGT sensor. Our extensive testing and data logging has shows the factory ECU does not use the e.g.t. sensor for air/fuel adjustment.

The factory ECU uses the egt sensor reading to kill the motor if temperatures exceed 1800 degrees. Once temperatures exceed 1800 degrees internal engine damage will have occurred. The sensor is simply not needed for run function and is likely to produce problems if reused.

We recommend that you do not remove this sensor form your factory up-pipe during installation. Instead, leave it installed in the factory up-pipe and store it with your other factory components removed during build up.

Monitoring your exhaust gas temperature is recommended for both proper tuning and safety. Please use a high quality electronic gauge and mount the temperature probe closer to the engine within the header system. The up-pipe is a poor mounting location because it is to far away from the exhaust ports for an accurate temperature reading.

Plug the included resistor into the egt sensor wire harness to insure no check engine lights.