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](https://s.turbifycdn.com/aah/yhst-1408381693991/hks-flat-flange-3-inch-downpipe-suabru-wrx-02-07-sti-04-07-33006-bf001-40.png)
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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
![](http://site.icbmotorsport.com/New3/HKS_Flat_Flange_3inch_Downpipe_Suabru_WRX_0207_STi_0407_33006_BF001_1.JPG)
![](http://site.icbmotorsport.com/New3/HKS_Flat_Flange_3inch_Downpipe_Suabru_WRX_0207_STi_0407_33006_BF001_2.JPG)
![](http://site.icbmotorsport.com/New3/HKS_Flat_Flange_3inch_Downpipe_Suabru_WRX_0207_STi_0407_33006_BF001_3.JPG)
![](http://site.icbmotorsport.com/New3/HKS_Flat_Flange_3inch_Downpipe_Suabru_WRX_0207_STi_0407_33006_BF001_4.JPG)
![](http://site.icbmotorsport.com/New3/HKS_Flat_Flange_3inch_Downpipe_Suabru_WRX_0207_STi_0407_33006_BF001_5.JPG)
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