Quote:
Originally Posted by SGOS252382
Weren't these runs done with muffler delete? (SLP loudmouth 1)That's not stock.
The L99 runs pretty restrictive mufflers. See post # 103 vs. # 104 in this thread.
http://www.camaro5.com/forums/showth...ffler+pictures
The L99 mufflers are different from the straight through design of the LS3's. So a muffler delete on an L99 should be good for some HP.
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everything thing I have read concludes the real restriction is way before the mufflers and that an axle back adds nothing but sound