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Old 06-30-2012, 10:52 AM   #10
coloeb
 
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Drives: 2012 2LT/RS 6L50 automatic TF-3
Join Date: Apr 2012
Location: Natchez, Ms.
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Quote:
Originally Posted by colingordon View Post
So to sum all of that up, straight pipes are good because they eliminate back pressure more then a muffler?
Actually the muffler installs back pressure as does the cats and any other restrictions in the exhaust. The trick seems to be getting the back pressure as low as possible while maintaining the proper exhaust gas velocity. It seems unlikely anyone could get this correct without testing these 2 variables.
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