Invidia Downpipe catted divorced bellmouth - WRX/STi 02-07
Invidia downpipes provide a very noticeable gain in horsepower and torque by freeing the flow of exhaust gas closest to the turbocharger or headers. Most Invidia downpipes features a large 4-in stainless-steel bellmouth and 3inch piping to enhance power by freeing excess gas. Each Invidia Down Pipe can be bolted up to any Invidia Exhaust or a stock exhaust for an easy installation.
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