LT1-LT4 Modifications 1993-97 Gen II Small Block V8

qtp cutout

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Old Jul 25, 2007 | 12:33 AM
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Default qtp cutout

where is the best place to put the qtp cutout on my 94 formula? what size is the stock exhaust pipe before the cat?
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Old Jul 25, 2007 | 08:43 AM
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...3"
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Old Jul 25, 2007 | 09:28 AM
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is the car stock? if so, don't put a cutout on it
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Old Jul 25, 2007 | 11:53 AM
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3" is the cutout size u want,you can order it from here http://www.ws6project.com/user_stor/...0b5231fc6f9417 fast shipping and good price. Nothing wrong with putting it on a stock car.
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Old Jul 25, 2007 | 10:42 PM
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yea why not put one on a stock car? why do i want 3in? just wondering?
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Old Jul 25, 2007 | 11:48 PM
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3'' is the stock pipe size.
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Old Jul 26, 2007 | 12:20 AM
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ok. now where is the best place to put the cutout?
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Old Jul 26, 2007 | 01:32 AM
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on the y pipe or I pipe from what ive been reading.
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Old Jul 26, 2007 | 01:36 AM
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3 inch is NOT the stock exhuast pipe size.
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Old Jul 26, 2007 | 01:41 AM
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Originally Posted by Schweet97Z
3 inch is NOT the stock exhuast pipe size.
SWEET!! Then what is?
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Old Jul 26, 2007 | 01:41 AM
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Yeah isn't the stock exhaust 2.75"?
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Old Jul 26, 2007 | 01:45 AM
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nighthawk is right. also put the cut out in the I-pipe right before it goes over the rear axle.

https://ls1tech.com/forums/generation-iii-external-engine/710424-got-my-cutout.html

Last edited by Schweet97Z; Jul 26, 2007 at 02:00 AM.
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Old Jul 26, 2007 | 11:27 AM
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why there and not before the cat???
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Old Jul 26, 2007 | 12:30 PM
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No room for a cutout before the cat,you'd have to chop off your cat,which im sure would go REAL well in california we can do that here in oklahoma BTW 3" is not the stock exhaust size,but 3" makes it alot easier to install when its getting welded in,i'd go with 3",the exhaust shop will thank you for it.
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Old Jul 26, 2007 | 12:56 PM
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Ok 3" is what I used when I got mine installed wayyy back when. I just assumed it was the exact size of the stock pipe.
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Old Jul 26, 2007 | 01:12 PM
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oh ok i thought it might be a clearance issue.. that blows. so i should install it after the cat under the passenger seat? thats the 2nd best lol
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Old Jul 26, 2007 | 02:45 PM
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Yea pretty much the only logical place to put it with stock exhaust.
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Old Jul 26, 2007 | 02:47 PM
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is by the passenger seat? aft the cat?
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Old Jul 26, 2007 | 03:25 PM
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yea, it will be right behind the passanger seat before the pipe goes over the axle. that way if you use an electric motor to open and close the cutout there is an indentation on the floor board to where you can turn the cut-out motor upwards so it doesnt hang low and get ripped off.
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Old Jul 27, 2007 | 12:50 AM
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Dont wanna hijack the thread, but what do most of you all notice,gain wise, in the 1/4 with a cutout?
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