Thread: 2009 H2 gas mileage improvement?
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Old 10-16-2010, 12:55 AM
Xotik H3 Xotik H3 is offline
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Default Re: 2009 H2 gas mileage improvement?
Quote:
Originally Posted by HUMMERICH23
GM performance Parts air intake, Corsa Sport Cat Back Performance Exhaust, Westers Tuners 93 Hot tune

At least it will sound better while giving you a .5 increase in mpg.
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