the Audi S4 Owners' Resource  



mike01s4's Aftermarket Filter Testing:
by Mike Shimon (VAST Performance)

Golem: Many people often wonder if an aftermarket air filter system for the Audi S4 would result in substantive improvements over the stock system. Mike was kind enough to send over a graph of various MAF logs taken with different aftermarket automobile intakes installed.

K&N Drop-in Air Filter vs. Evo Motorsports Cold Air Intake, stock Audi ECU

03/02/02
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