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Discussion Starter · #1 ·
My name is Bob. I have a 2007 Envoy Denali 5.3 V8. Plans include a dual exhaust modification and hi flow air box with some programming to maximize fuel economy and HP/ torque.
I'm open to suggestions on the exhaust mods, but has to be a bolt on as I'm going to do this in the driveway.
Thanks.
 
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