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Riss Racing 3 inch catless downpipes. These are the world's strongest 335i downpipes, bar none!.
Gains:
-30whp and 50wtq on a stock car
-up to 60whp and 70wtq on a tuned car
Also available in a Ceramic Coated Version!
Tested at 2200 degrees for 14 hours straight. Power gains increase approximately 3% on average with this thermal coating. Authentic ceramic coating, not spray can coating that will scrape off!
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