91Z 5.7 dual cats, lots of ?'s
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Joined: Feb 2001
Posts: 282
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From: Johnston,Iowa,USA
Car: 1986 Monte SS / 1988 Iroc-Z
Engine: LS3 / L98
Transmission: 4l80E / T56
Axle/Gears: 3.73 / 3.45
91Z 5.7 dual cats, lots of ?'s
I'm lookin at buyin a 91 Z28, it has the Dual Cats, and the hole exhaust is pretty shot. I am looking to do headers, and then a good catback. Also do i need to replace both cats, or should i make it into one, high flow cat? Also does Hooker make a catback for the 5.7, carparts.com isn't showing one for a 5.7, I found one for my friends 91 RS 305, but not the 91 Z28 with a 350, Is it all the same or not?
Also what headers do you guys suggest, I was thinking the SLP's, they look to be the most free flowing type.
What about the cats? Should i get dual CUTCOs? or should i make it into a single CUTCO? Or should it even be a CUTCO at all?
Sorry for the length,
Thanks,
Nate.
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1989 Camaro RS. Bright Red/ 55,XXX miles.
1983 Camaro Sport coupe rusted out blue with green spray paint with black highlights of spraypaint(your get the picture) IRON DUKE 4cyl, Project car for summer.
Mid Iowa Camaro Club Member
ICQ# 39648953
http://screaminz.50megs.com
Also what headers do you guys suggest, I was thinking the SLP's, they look to be the most free flowing type.
What about the cats? Should i get dual CUTCOs? or should i make it into a single CUTCO? Or should it even be a CUTCO at all?
Sorry for the length,
Thanks,
Nate.
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1989 Camaro RS. Bright Red/ 55,XXX miles.
1983 Camaro Sport coupe rusted out blue with green spray paint with black highlights of spraypaint(your get the picture) IRON DUKE 4cyl, Project car for summer.
Mid Iowa Camaro Club Member
ICQ# 39648953
http://screaminz.50megs.com
Member
Joined: Feb 2001
Posts: 129
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From: eastbay,cal.
I just replaced my stock dual cats with Catcos they were only like $120.00 shipped to my door from Summitt Racing and arrived on a Sunday which I did not expect I ordered them on Friday. I would keep the dual cats since that is what your car came with.I also have SLP headers on my car which I have no complaints about.
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Joined: Nov 2000
Posts: 490
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From: E. Patchogue, NY
Car: '90 Iroc
Engine: 305 TPI
Transmission: 5 spd
Don't look to carparts.com for performance stuff, or most anything for that matter. Look to Jeg's www.jegs.com or summit www.summitracing.com
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'89 Camaro RS 6cyl. auto, don't know how much longer I'll have it.
'90 Iroc TPI 305, 5 spd B&M Ripper shifter, hopefully I can rob a bank or something and get more
www.geocities.com/irocnroll90
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'89 Camaro RS 6cyl. auto, don't know how much longer I'll have it.
'90 Iroc TPI 305, 5 spd B&M Ripper shifter, hopefully I can rob a bank or something and get more
www.geocities.com/irocnroll90
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Joined: Oct 2000
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From: Tennessee
I'll agree with you about performance stuff, but it is an excellent source of stock AC Delco parts.
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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."
------------------
1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."
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