Make sure your connections are tight, you may have a carbon monoxide migraine, not good. I have the BTG axil back and it is loud
but I don't notice a resonance as I go
through 3K rpm.[8)]
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Inferno Red \'04 GT Autostick, Stage I, BTG exhaust, Airforce One intake, V.A.K. Candy Red upper charge pipe, BTG strut bar,Hyperground, chrome side spears and grill accents.
