02-07 WRX & STI HKS Catless Downpipes
HKS offers two catless dowpipe options for the 2002-2007 WRX and STI: The flat flanged 33006-BF001 and the bellmouth 33006-BF002. Both of these HKS downpipes eliminate 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
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, we do not recommend it 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.
| Description | Part # | MSRP | Price | Inventory | |
|---|---|---|---|---|---|
| Flat Flange Downpipe | 33006-BF001 | $195.00 | $156.00 | 8 available |
The HKS 33006-BF002 Catless Bellmouth Downpipe for the 2002-2007 WRX & 2004-2007 STI is 3" of mandrel bent stainless steel designed to improve exhaust flow. The bellmouth 33006-BF002 is an excellent option for your 02-07 WRX & STI if you are running an aftermarket, upgraded turbo and supporting tune.
| Description | Part # | MSRP | Price | Inventory | |
|---|---|---|---|---|---|
| Bellmouth Downpipe | 33006-BF002 | $475.00 | $380.00 | 5 available |
