  Downpipes
The downpipe is the section of the exhaust system that extends from after the turbocharger (actually, after the oxygen sensor housing) to the catalytic converter. The factory downpipe has small 1 ¾” internal diameter that restricts the flow of the exhaust. Buschur Racing high-performance downpipes open up this restriction to allow your turbo to produce the highest amount of power. All Buschur Racing downpipes are engineered with a stainless-steel flex section, just like the factory downpipe, to provide stress relief and prevent cracking.
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