Fitment Information: This crosspipe fits 2002 - 2005 Subaru WRX, 2008 - 2014 Subaru WRX, 2004 - 2021 Subaru STI, and 2005 - 2009 Subaru Legacy GT. Note that it does not fit 06 - 07 WRX. Features: Crafted from 304 stainless steel, including flanges, flex, and tubing, with a 14 - gauge pipe - wall thickness, this is an extremely heavy - duty aftermarket pipe. The unique Triple Layer Flex Joint, not placed in the bend, extends the flex section's lifespan. Built from 1.92 - inch 304 stainless steel tubing, it maximizes exhaust flow from cylinders 1 and 4 to the manifold collector, enabling faster turbo response. The flanges are cut back inside to provide a flush mating surface for optimal flow. Available in a brushed finish or a ceramic heat coating that retains heat and speeds up exhaust gasses. Finish options are brushed (uncoated) or black ceramic coated. Other benefits include improved boost transition over stock, enhanced airflow in the mid - to - high RPM range, included heavy - duty GrimmSpeed gaskets, a 'Tuned - Bellow' flex joint with an interlocking liner, a smooth pipe - to - flange connection, 1/2 - inch 304 stainless steel CNC - milled flanges, a 5 - 8 HP increase, and it's sold individually.
Using the GrimmSpeed High - Flow Crosspipe is straightforward. First, make sure your vehicle is within the specified fitment range (2002 - 2005 Subaru WRX, 2008 - 2014 Subaru WRX, 2004 - 2021 Subaru STI, and 2005 - 2009 Subaru Legacy GT, but not 06 - 07 WRX). When installing, take advantage of the included heavy - duty GrimmSpeed gaskets for a proper seal. As for maintenance, if you choose the brushed finish, a simple wipe - down with a stainless - steel cleaner will keep it looking good. For the ceramic heat - coated option, avoid using abrasive materials that could scratch the coating. Regularly check the flex joint and flanges for any signs of wear or looseness. If you notice any issues, it's best to have it inspected by a professional mechanic.
