High Flow Full 3" O2 Housing for Evo 4/5/6/8/9 It is very important to

It is very important to understand that the air inlet tract of the turbo system is as important

COMPRESSOR

cast unit over the stock unit is the ability to improve breathing at the exhaust ports as well as providing the necessary exhaust volume to maintain high boost/high RPM operation

5 through 2008 B7 Audi A4 with 2

High Flow Full 3" O2 Housing for Evo 4/5/6/8/9 It is very important toHigh flow full 3" O2 housing for Evo 4 5 6 8 9. Deletes the factory donut gaskets to eliminate the 2. 5" restriction between most O2 housings and downpipes and creates a true 3" all the way through flow path from entry to exit. Works fantastically well with large stock location turbos with large turbine wheels. This eliminates one of the biggest bottlenecks in the Evo exhaust system. Also, 02 bung is strategically located away from the direct exit of