Home | BRANDS | HKS Flat Flange 3 inch Downpipe Suabru WRX 02-07 STi 04-07 33006-BF001
HKS Flat Flange 3 inch Downpipe Suabru WRX 02-07 STi 04-07 33006-BF001
The HKS 33006-BF001 downpipe is designed as a simple, cheap solution which eliminates both catalytic converters on your 02-07 WRX or STI and features 3" piping for improved flow. While the HKS flat flange downpipe will improve performance, it is not recommended for anything other than a stock turbo, due to the flat-plate design that creates wastegate turbulence. This turbulence does help reduce boost spiking in 2.5L Subaru. The 3" with a flat rear flange is designed to accommodate 3" aftermarket catback exhausts.This downpipe eliminates both OEM catalytic converters, and therefore, are not emissions legal and they will trigger a Check Engine Light (CEL). We recommend the Cobb AccessPORT to properly tune the vehicle for these HKS downpipes and to eliminate the CEL.
FITMENT:- Subaru STI 2004-2007- Subaru WRX 2002-2007