Z28 Exhaust Manifolds - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Scott@Bjorn3D · 08-08-2015, 10:35 AM

Wondering how these would do on a LS3 without tuning the car. I know the cars run rich all ready would putting these on without a tune about even out everything and give me a little more kick in the ass?

2010reddevil · 08-08-2015, 10:51 AM

The bad thing is they require either mods to the OEM exhaust to fit or the Z28 specific exhaust.

Scott@Bjorn3D · 08-08-2015, 11:30 AM

Quote:

Originally Posted by 2010reddevil

The bad thing is they require either mods to the OEM exhaust to fit or the Z28 specific exhaust.

Actually there are adapters sold by GM. It will work with my NPP.

Synner · 08-08-2015, 11:55 AM

You'd be better off just gutting your stock cats and getting the spacers people have used for the rear O2's. You'd probably get more power and it'd cost you $30.

If you were adding them plus the Z28 cats no you won't need a tune but that's because it aint changing much, laymans terms for not a lot of added power. Looking in the GMPP catalog it doesn't include the cats though which means modifying existing or buying very expensive GM cats. I also only see an adapter kit to put the Z28 catback onto the LS3 cat connection point but not the other way around, tri-Y to factory exhaust.
http://www.chevrolet.com/performance...parts/z28.html

Buy headers.

GONIF · 08-08-2015, 12:27 PM

Just bite the bullet and get longtubes .

08-08-2015, 10:35 AM	#1
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	Z28 Exhaust Manifolds Wondering how these would do on a LS3 without tuning the car. I know the cars run rich all ready would putting these on without a tune about even out everything and give me a little more kick in the ass?

08-08-2015, 10:51 AM	#2
2010reddevil Drives: 2010 Camaro 2SS Victory Red 6M Join Date: Apr 2015 Location: Gulf Coast, TX Posts: 1,424	The bad thing is they require either mods to the OEM exhaust to fit or the Z28 specific exhaust. __________________ 2011 2SS 6A Red Jewel Metallic, Vararam Tune CAI, Magnaflow 3" Competition c/b, Speed Engineering 1-7/8 LT's, Circle D 5C, M/T 275/40R20 S/S, HPTuners tune by Ryan@GPI 12.3 @ 112 ACM as of 12/22/19 Gone on 12/28/19 R I P 2010 2SS 6M Victory Red/Black (old ride) CAI intake, Speed Engineering 1 7/8" LT's, X4 base tune, Flowmaster Outlaw axle-back. 12.6 @ 115 SAR as of 9/19/15 Gone but never forgotten.

08-08-2015, 11:55 AM	#4
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,545	You'd be better off just gutting your stock cats and getting the spacers people have used for the rear O2's. You'd probably get more power and it'd cost you $30. If you were adding them plus the Z28 cats no you won't need a tune but that's because it aint changing much, laymans terms for not a lot of added power. Looking in the GMPP catalog it doesn't include the cats though which means modifying existing or buying very expensive GM cats. I also only see an adapter kit to put the Z28 catback onto the LS3 cat connection point but not the other way around, tri-Y to factory exhaust. http://www.chevrolet.com/performance...parts/z28.html Buy headers. Last edited by Synner; 08-08-2015 at 12:18 PM.

08-08-2015, 12:27 PM	#5
GONIF Drives: 73 VETTE ,, 05 2500hd diesel,14 1LE Join Date: Feb 2014 Location: The Left lane PHOENIX AZ Posts: 2,626	Just bite the bullet and get longtubes . __________________ OLD GUY FLYING FAST AND LOW