I replaced the air filter with the AIRAID and didn't see much in fuel economy improvement. Added Basanni Cat-back system, which showed slight improvement for fuel economy (1MPG). Added Basanni full headers (Cal legal) and I've added another 1 to 2 MPG on average. I typically drive 80% on the higway at 70MPH and rest is city stop and go.
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04 H2 Black LUX, Air suspension, NAV, Basanni Cat-back exhaust & full ceramic headers, Airaid Intake, Audiovox headrest DVD system
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