The Invidia divorced wastegate downpipes for the 2008 Subaru WRX are designed to replace the restrictive, OEM two-piece downpipe that contains not one but two standard catalytic converters. Invidia made the 08 WRX downpipe from mandrel bent 3" stainless steel and welded on a thick flange and cast stainless steel housing to provide maximum airflow and improved performance. A divorced wastegate downpipe has a plate that protrudes into the turbo to separate exhaust flow coming out of the turbo to reduce turbulence. This is optimal for stock and smaller-sized turbo upgrades. The high-flow catted Invidia WRX downpipe is not emissions legal, and may still cause a CEL in some cases. The high-flow catted downpipe also helps to reduce boost spike by adding back pressure to the turbo system.
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