LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

disconnect exhuast after cats? help or hurt 1/4

Old 09-17-2004, 10:20 AM
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disconnect exhuast after cats? help or hurt 1/4

okay i posted this in general but i think you guys might have a better answer for me -

im going to track again tonight - dont have my catback on and my e-cutout didnt make it in time - question is if i disconnect my exhuast before the muffler would i see an improvement -aka running a cutout -

mods ill be running with are SLP shorty headers - K&N FIPK - TB bypass - and programming -



ive been reading and either people say it will hurt or help - whats ur opinions on this?
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Old 09-17-2004, 11:14 AM
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Re: disconnect exhuast after cats? help or hurt 1/4

It could help and hurt. I know that running open headers will cause some retarding from all the exhaust noise and vibration, but it's so far back in your cause that i'm not sure. Give it a try and see what happens.
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Old 09-17-2004, 03:30 PM
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Re: disconnect exhuast after cats? help or hurt 1/4

I just cut my flowmaster off behind hte axel. Didnt see to hurt low end but helped the top end. I would say it will help. I dont have times to prove it, just what i feel.
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Old 09-17-2004, 05:42 PM
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Re: disconnect exhuast after cats? help or hurt 1/4

when i ran my cutout at the track i noticed .2 tenths quicker and about 1 mph gain.
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Old 09-17-2004, 06:27 PM
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Re: disconnect exhuast after cats? help or hurt 1/4

You won't know unless u try it both ways on the same day at the track. Let us know how it works out.
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Old 09-18-2004, 09:53 AM
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Re: disconnect exhuast after cats? help or hurt 1/4

damn ended up pouring so didnt go to track - sux next open track day is in 2 weeks
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