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.
The HKS Catless Bellmouth Downpipe for the 2002-2007 WRX & 2004-2007 STI is 3in 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.
Part Number: 33006-BF002
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