Dual exhaust system

blackwarbeast · 03-02-2009, 06:26 AM

95 GMC 1500 5.7 EFI - Im about to call a shop in town for a quote. I was wonder if I can have put on a true dual exhaust on this without the use of a catalytic coverter? or will it mess something up not running a cat?

leolkfrm · 03-02-2009, 06:39 AM

Do you need the cat for state inspection?

mudseeker · 03-02-2009, 07:02 AM

keep the cat, unless you plan on getting the sensors tuned out of the computer.

blackwarbeast · 03-02-2009, 07:39 AM

I dont know about inspection because im not getting one or anything. But I do know the weld is rusted off of the cat and the piping after it is just hanging in place. Basically I want to get MUCH better flow while replacing my bad piping and possibly the cat. When this thing goes up steep hills, it has NO power whatsoever and I cant stand it. Im afraid if I try to push it up the hills too hard itll mess it up.

leolkfrm · 03-02-2009, 08:17 AM

You could use a hiflow cat and cat back duals,

blackwarbeast · 03-02-2009, 09:27 AM

Quote:

Originally Posted by mudseeker

keep the cat, unless you plan on getting the sensors tuned out of the computer.

What would I require to tune out the sensors and how much would it run me? Im trying to measure up the cost of doing that against the cost of replacing my whole exhaust (cat & piping kit, cat-back dual kit) which would be $596 from Jegs for what I prefer.

mudseeker · 03-03-2009, 10:09 AM

a tune could cost between $200-$500.

blackwarbeast · 03-15-2009, 02:53 PM

Can a Cat Back system be used with headers? full-length?

leolkfrm · 03-15-2009, 03:27 PM

Yes, as long as there are bung hole(s) for the O2 sensor(s)

blackwarbeast · 03-15-2009, 05:46 PM

Quote:

Originally Posted by leolkfrm

Yes, as long as there are bung hole(s) for the O2 sensor(s)

Do both headers need the hole in them?

03-02-2009, 06:26 AM	#1
blackwarbeast Senior Member Join Date: Feb 2009 Posts: 52	Dual exhaust system 95 GMC 1500 5.7 EFI - Im about to call a shop in town for a quote. I was wonder if I can have put on a true dual exhaust on this without the use of a catalytic coverter? or will it mess something up not running a cat?

03-02-2009, 06:39 AM	#2
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	Do you need the cat for state inspection? __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

03-02-2009, 07:02 AM	#3
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,373	keep the cat, unless you plan on getting the sensors tuned out of the computer. __________________ i'd rather be hunting

03-02-2009, 08:17 AM	#5
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	You could use a hiflow cat and cat back duals, __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

03-03-2009, 10:09 AM	#7
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,373	a tune could cost between $200-$500. __________________ i'd rather be hunting

03-02-2009, 07:39 AM	#4
blackwarbeast Senior Member Join Date: Feb 2009 Posts: 52	I dont know about inspection because im not getting one or anything. But I do know the weld is rusted off of the cat and the piping after it is just hanging in place. Basically I want to get MUCH better flow while replacing my bad piping and possibly the cat. When this thing goes up steep hills, it has NO power whatsoever and I cant stand it. Im afraid if I try to push it up the hills too hard itll mess it up.

03-15-2009, 02:53 PM	#8
blackwarbeast Senior Member Join Date: Feb 2009 Posts: 52	Can a Cat Back system be used with headers? full-length?

03-15-2009, 03:27 PM	#9
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	Yes, as long as there are bung hole(s) for the O2 sensor(s) __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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