LT headers with stock exhaust - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Maverick10 · 09-23-2011, 10:53 AM

Would it matter? I'm thinking about doing the long tubes first and later on getting a cat back since the thing I want most is obviously the headers. It sorta seems like I want to do everything backwards but I think what was holding me back is that I wanted them most and felt like it was the last thing I needed to put on. Is it going to sound better or worse? Is this a horrible idea? I'm still going to end up with the same setup just not in the same order...

cntryman77 · 09-23-2011, 11:14 AM

you really should get the catbacks first...it's the same philosophy as a CAI for me...why add the ability to flow more air if the exhaust is going to restrict it anyways...it won't really hurt anything to do it in the order you want, but you want see much in the way of gains until you do the rest...I've never heard LTs with the factory exhaust though

Maverick10 · 09-23-2011, 12:29 PM

Yeah it's got me curious... I wanna know how it sounds. But I definitely have to get rid of those giant stock mufflers soon

MaRoFreK · 09-23-2011, 12:33 PM

If I'm not mistaking the stock exhaust is a straigh through design, its not very restrictive. I've seen a few videos on youtube of Camaros with headers and Stock exhaust I thought they sounded good. I'll try and find one and shoot you the link.

MaRoFreK · 09-23-2011, 12:34 PM

usa1camaro1969 · 09-23-2011, 12:38 PM

The stock exhaust itself isn't very restrictive, the manifolds are. You'll still see good gains(it's a 3.6L with duals running 2.25" tubes, the stock 396 exhaust in my '68 was 2.25" and restricted that motor).

MaRoFreK · 09-23-2011, 12:40 PM

Quote:

Originally Posted by usa1camaro1969

The stock exhaust itself isn't very restrictive, the manifolds are. You'll still see good gains(it's a 3.6L with duals running 2.25" tubes, the stock 396 exhaust in my '68 was 2.25" and restricted that motor).

Yea I was refering to the stock Catback. Thanks for the conformation lol

KMPrenger · 09-23-2011, 03:07 PM

I see absolutely no issues with doing the LT headers first. You will still make great power with them installed on the stock exhaust...so don't worry about that.

I'm thinking it probably won't sound all that bad either!

Do it and post up videos for all of us to hear!

JDP Tech · 09-26-2011, 01:01 AM

Yeah, that would be no problem at all, and in fact, with long tubes, high flow cats, and an aftermarket exhaust, its a lot louder than with just a cat-back (or axle-back), possibly too loud for many people.
So doing headers and cats first, may be the best option, so you can determine if you then want to get louder or not.

BaylorCamaro · 09-26-2011, 01:14 AM

Quote:

Originally Posted by usa1camaro1969

The stock exhaust itself isn't very restrictive, the manifolds are. You'll still see good gains(it's a 3.6L with duals running 2.25" tubes, the stock 396 exhaust in my '68 was 2.25" and restricted that motor).

This

SIXJAK · 09-26-2011, 02:54 AM

Echo all of the comments. Try it. You may have to modify the length of your stock exhaust though. LT's x HFC's = longer than factory exhaust manifolds/cats. My Stainless Works LT's/Random Tech HFC's were about 5" longer than the stock pieces they replaced.

09-23-2011, 10:53 AM	#1
Maverick10 Drives: Black '13 ZL1 M6 Join Date: Apr 2011 Location: Tampa, FL Posts: 41	LT headers with stock exhaust Would it matter? I'm thinking about doing the long tubes first and later on getting a cat back since the thing I want most is obviously the headers. It sorta seems like I want to do everything backwards but I think what was holding me back is that I wanted them most and felt like it was the last thing I needed to put on. Is it going to sound better or worse? Is this a horrible idea? I'm still going to end up with the same setup just not in the same order...

09-23-2011, 11:14 AM	#2
cntryman77 Drives: 2010 Camaro LS Join Date: Mar 2010 Location: Newton Falls, OH Posts: 1,092	you really should get the catbacks first...it's the same philosophy as a CAI for me...why add the ability to flow more air if the exhaust is going to restrict it anyways...it won't really hurt anything to do it in the order you want, but you want see much in the way of gains until you do the rest...I've never heard LTs with the factory exhaust though __________________ My build thread: http://www.camaro5.com/forums/showthread.php?t=126631

09-23-2011, 12:33 PM	#4
MaRoFreK Drives: IOM 1SS w/factory Hurst Join Date: Jan 2011 Location: Buckhannon, West Virginia Posts: 721	If I'm not mistaking the stock exhaust is a straigh through design, its not very restrictive. I've seen a few videos on youtube of Camaros with headers and Stock exhaust I thought they sounded good. I'll try and find one and shoot you the link. __________________ "Success is following the pattern of life one enjoys most." Stainless works Catback with Flowmaster Single Chamber Mufflers, Vararam, Factory Hurst, SLP SS emblems, SLP Skip Shift

09-23-2011, 12:38 PM	#6
usa1camaro1969 Back on the dino-juice Drives: '10 LS + a few more Join Date: May 2010 Location: Texas Posts: 1,641	The stock exhaust itself isn't very restrictive, the manifolds are. You'll still see good gains(it's a 3.6L with duals running 2.25" tubes, the stock 396 exhaust in my '68 was 2.25" and restricted that motor). __________________ I wake up in the morning and I piss excellence. -Ricky Bobby America is all about speed. Hot, nasty, badass speed. -Eleanor Roosevelt, 1936

09-23-2011, 03:07 PM	#8
KMPrenger Drives: 16 Camaro SS, 15 Colorado Join Date: May 2009 Location: Jefferson City, Missouri Posts: 13,943	I see absolutely no issues with doing the LT headers first. You will still make great power with them installed on the stock exhaust...so don't worry about that. I'm thinking it probably won't sound all that bad either! Do it and post up videos for all of us to hear! __________________ 2016 Camaro 1SS - 8-speed - NPP - Black bowties 2010 Camaro 1LT V6 (Sold. I will miss her!)

09-23-2011, 12:29 PM	#3
Maverick10 Drives: Black '13 ZL1 M6 Join Date: Apr 2011 Location: Tampa, FL Posts: 41	Yeah it's got me curious... I wanna know how it sounds. But I definitely have to get rid of those giant stock mufflers soon

09-26-2011, 01:01 AM	#9
JDP Tech Drives: 2010 CGM Camaro 2SS/RS 429 LSX/F1X Join Date: Aug 2011 Location: Sandy, UT Posts: 429	Yeah, that would be no problem at all, and in fact, with long tubes, high flow cats, and an aftermarket exhaust, its a lot louder than with just a cat-back (or axle-back), possibly too loud for many people. So doing headers and cats first, may be the best option, so you can determine if you then want to get louder or not.

09-26-2011, 02:54 AM	#11
SIXJAK Drives: MO's only SC'd LLT. Join Date: Feb 2010 Location: Branson MO Posts: 2,574 View My Garage	Echo all of the comments. Try it. You may have to modify the length of your stock exhaust though. LT's x HFC's = longer than factory exhaust manifolds/cats. My Stainless Works LT's/Random Tech HFC's were about 5" longer than the stock pieces they replaced. __________________ IPF supercharger kit, IPF tune, SW LT's, R. Tech HFC's, ARK DT-S catback, SS Brembo brake upgrade, BC Racing adjustable coilovers, Hurst STS, Pfadt rear arm package, Pfadt adjustable sways & end links, Pfadt diff bushings, BMR rear cradle full kit blk bezels,SS diffuser, Innovate gauges.

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