20 rwhp from cutout

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May 2, 2006 | 05:57 PM

#21

Brian2001SS

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From: western NC

I was at the dyno this past Friday and my car only picked up 2 hp over the gmmg. And a friend of mine did not pick up any over a hooker cat back.

Just for your info.

May 2, 2006 | 07:23 PM

#22

1 Fine 69

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From: New Jersey

im keeping my single in single out.....the 427 should sound nasty through those

May 4, 2006 | 02:46 PM

#23

fastbird96

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From: Tennessee

I picked up 21 hp and 14 torque with the cutout open on my old setup. This was over a hooker muffler.
Here's the dyno sheet. http://i16.photobucket.com/albums/b3...race/dyno1.jpg

Last edited by fastbird96; May 4, 2006 at 02:52 PM.

May 5, 2006 | 08:24 AM

#24

M6HTZ

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I picked up 60 rwhp with my cut-out. I had a used catback. I was told it was a spintech, but I can't be sure. I went on the dyno after LT's, cam pulley, tb etc and had less power than stock. I was a little freaked out, then we opened the cut-out and picked up 60 hp. I took the pos catback off and put a magnaflow on.

There must have been a collapse in the muffler that was just insane.

May 5, 2006 | 09:01 AM

#25

Bad Habit Bird

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From: The Woodlands, TX

I had a 4" mufflex catback with a Spintech muffler on my old car, It sounded bad *** but I lost 29rwhp and 34ftlbs going through it vs. a cutout.

May 5, 2006 | 11:16 AM

#26

pewter 01 SS

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From: cali

i use to have flowmaster (dont know which one, the car had it when i bouth it) but i went from 478/444 to 518/487.. sure enough i was told that flowmaster sucked.. since then i switched to magnaflow which by the way made the car sound not as loud wich was what i wanted but when i redynod to see the difference it was minimal.. i only gaind like 2hp and 10rwtq.. overall iam happy on the switch and would recommend magnaflow

May 5, 2006 | 03:17 PM

#27

blkbird

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From: san antonio, tx

I got an 80 Flowmaster on mine. I just did my cam. Should I replace it or get a cut-out and if so with what. I really havent researched them much. I will be going to get it tuned in a few week and I guess that will determine what I do with it. I didnt realize how much the flowmasters choked up our LS1's.