Thread: Muffler size ?
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Old 02-23-2009, 05:21 AM
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2KWIK4U 2KWIK4U is offline
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Join Date: Jan 2004
Location: McAlester, Ok
Cobra Make, Engine: Lonestar LS427, Keith Craft 496 Genesis, 649 hp, 668 ft-lb, TKO-600, Dynatek Stack EFI
Posts: 204
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Kevin
I have the 3.5" Howe's with a 496 c.i. KC, 650ish and don't thinks it's overly loud, but do have the outlets turned down slightly.

Here's the scoop
KC Engine dyno: 649 hp, 668 trq

Stock LS exhaust
2" headers
1.75" J-pipes
3" collectors
LS mufflers ?size
3" outlets
Chassis dyno: 427 rwhp, 415 rwtrq

Exhaust #1
2" headers
2" j-pipes
3.5" collectors
4" x 24" Lobek Auger Mufflers, don't remember auger size
3.5" outlets
Chassis Dyno: 506 rwhp, 535 rwtrq

Current Exhaust
2" headers
2" j-pipes
3.5" x 3" x 3.5" Merge Collectors
4" x 24" Howe Racing Mufflers (3.5" I.D.)
3.5" outlets
Chassis Dyno: 519 rwhp, 541 rwtrq

Brad W.

PS: Added photo to gallery that shows the current setup
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Last edited by 2KWIK4U; 02-23-2009 at 05:48 AM.. Reason: more info
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