Perrin - Subaru 15-21 WRX - Charge Pipe (Black) subaru-forester-xt-2013 They are guaranteed not to

They are guaranteed not to fail to the said RPM and are all SFI approved

High engine temperatures can result in rapid oil degradation and potential engine damage

paint damaging gravel

Purple finish

The kit includes black braided fuel lines

Perrin - Subaru 15-21 WRX - Charge Pipe (Black) subaru-forester-xt-2013 They are guaranteed not toOVERVIEW Replace the restrictive OEM plastic charge pipe to increase horsepower and boost response with the PERRIN Charge Pipe for 2015+ WRX! BETTER AIRFLOW The OEM charge pipe on the FA20 DIT engine is restrictive, narrows down in certain points, and has pleats that make for uneven airflow. The PERRIN Charge Pipe has a perfectly smooth interior, constant radii, and gradual bends, making for much more efficient air delivery. This all combines to