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I have the Insert's, works pretty good. 4" aswell, just takes the tone down alittle...
Custom spec build headers, didn't want to chance the added length with the muffler.


T-flow
 

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what size pipe i have a 2 1/4 to 4" collector that is made into collector muffler with 1/2 a bullet on it then 1/4 turned down jethot coated
 

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Schoenfield makes a muffler similar to the pic above. They also make it in a collector insert that works great.
Has anyone tried the schoenfields on a drag car? We had to run them on some dirt circle track cars a few years ago, and they toned them down some. Seems like they should work good in drag too..
 

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I run Magnaflow race mufflers. Straight through design. No baffles, no louvers etc. Without the mufflers, I need ear plugs just to fire up the engine. Now after a day of racing with no ear plugs, my ears aren't ringing at ht end of the day.

Dual 4" in/out.
 

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Has anyone tried the schoenfields on a drag car? We had to run them on some dirt circle track cars a few years ago, and they toned them down some. Seems like they should work good in drag too..
Me and 3/4 of the cars at Greer Dragway has been running them for about 10 years now. Track has a muffler rule per a county ordinance. I wouldn't have a car without them.
 

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I have the 3.5" by 6" long schoenfelds on my 434 SBF. Running supercomp headers with 3.5" collector. I cut the 3 bolt flange off and used a straight band clamp to attach the schoenfeld to the headers. I notched the muffler and put a hole in the band clamp around the O2 sensor bung, so that helps keep it all together without getting loose and coming off the header. They toned it down a little, but not much. My class required mufflers. Just don't stick your fingers up inside the muffler LOL, those sharp edges in there will get ya.
 

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I have been running the dynomax bullet mufflers for years and I like them a lot.
 
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