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#1 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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ZZ4, Chevelle headers, Xpipe, dual Magnaflow mufflers
It was nice and sunny today. I drove around all day. Put on about 100 miles. Ouch! All city driving!
![]() ZZ4 at idle. Exhaust system - 3/4 length Chevelle headers, no cats, X pipe, dual Magnaflow 14" mufflers, and rear axel dump. Exhaust idle at 500 RPMs. Revs paused at 1000 RPMs and 2000 RPMs. Idle to near WOT bursts. Extra noise = loud LS1 fans and metal valve covers. Roller cam motors are loud at idle. Valve covers carry the noise. Exhaust system - 3/4 length Chevelle headers, no cats, X pipe, dual Magnaflow 14" mufflers, and rear axel dump. |
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