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| HKS 02-07 WRX & 04-07 STi Performance Downpipes |
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HKS offers two downpipe choices for the 2002-2007 WRX & 2004-2007 STi. The less expensive option is the flat-plate flange 33006-BF001. The 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-plate 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. Because of this turbulence the HKS 33006-BF001 downpipe helps reduce boost spiking in 2.5L Subaru. The 3" with a flat rear flange is designed to accommodate 3" aftermarket catback exhausts. |
| 33006-BF001 shown, above. | |
| 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 with an aftermarket turbo. |
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| 33006-BF002 shown, above. |
| Because the 33006-BF001 and 33006-BF002 eliminate both catalytic converters, they are not emissions legal and 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. |
| Shipping costs are calculated upon checkout. |
NOTE: These downpipes will not fit the 08+ WRX or STi
FITMENT: 02-07 Subaru WRX and 04-07 STi |
| Description |
Part #: |
MSRP: |
Price: |
Inventory |
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| Flat-Plate Downpipe |
33006-BF001 |
| Bellmouth Downpipe |
33006-BF002 |
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