Headers & Cat Back Exhaust

[firengnred]

This is where the resonator was and the X-pipe muffler now is


We cut the entire system out as one piece.


As a side note.... the mufflers each have what sounds like a half gallon or better of water sloshing around inside

Here's a better look at the resonator.


This is every bit as heavy as it looks. The new set up is a good 10-20lbs lighter.

[caverman]

Ok...mine will be an LS3 which is different but basically if I did the setup you did I would remove my resanotors as well.

Looking forward to hearing how it sounds.

BTW: if you got the 14379 for $90 you got what looks like a good deal. I can only find it for $120. I'm going to make some calls in the next day or so and see if they make a non-polished version for about $90 and/or find out what the differnce is between that one and the 11386.

[firengnred]

BTW: if you got the 14379 for $90 you got what looks like a good deal.

I got the parts from Magnaflow Plus Performance parts. They gave me a 25% discount.

I don't believe the LS3 has resonators. I could be wrong but I believe the L99 did only because of the AFM.

[SamSS]

Originally Posted by firengnred

I got the parts from Magnaflow Plus Performance parts. They gave me a 25% discount.

I don't believe the LS3 has resonators. I could be wrong but I believe the L99 did only because of the AFM.

L99 and LS3 both have resonators. L99 has that large resonator and LS3 has one small resonator on each pipe.

[RCPW]

Originally Posted by 2010SSRS

bottom lines is ANYTHING short of cat back upgrades need a tune to optimize performance. don't bother with shorty headers if you're looking for performance - they provide none.

Why Don't Shorty Headers Provide ANY Performance?
So Your Saying That The Stock Exhaust Manifolds Are Better Than Shorty Headers?

I dont know if I believe that at all.

When I installed JBA Shorty Headers on my Dodge Dakota 4.7L it Made a Huge Difference, Just Look at those Skinny Rails they were using for Manifolds Compared to the Headers, Now I dont know what a Stock Manifold looks like off of a 6.2L LS3, I Would Love to See 1 or Both Sides if anyone would happen to have a couple pictures of theirs that they could upload for us I'd love to check them out to see what they look like.

But when I installed them on my vehicle they certainly made a difference for me and even made more of a difference when I installed a SuperChips Tuner.

[JR-Vette]

Originally Posted by SamSS

So if I change the headers and put a cat back exhaust system on my car, what happens to the catalytic converters?
Do you recommend I change them too?
What kind of HP gain am I looking at?

What about the price? And I don't want shit quality products.
Magnaflow competition series cat back: $1000
Header: $???

Most "canned" exhaust systems are over priced and geared more for sound and not for best performance.

For less then half the costs you could have any muffler shop make up a system

I did several months of design and testing for my Corvette
Here is the race version
http://www.zshare.net/image/70291081ebd6a463/

This though is for use with helmet of ear plugs as sound level is about 105 DBA,

For street 3 inch tail pipes slip on and exit out the rear bumper and sound level inside the car drops to around 80 DBA

Canned designs have a X type pipe but in the wrong location, on mine you see it right off the collectors which helps for good exhaust pulses to pull exhaust out of the heads.

[firengnred]

L99 and LS3 both have resonators. L99 has that large resonator and LS3 has one small resonator on each pipe.

[thalilbear02]

Originally Posted by HeavyD

Long Tube headers the factory cats are gone. If you install shorties the factory cats stay and you don't have to worry about programming the car and keeping your warranty.

Originally Posted by SamSS

Wait, so if I install long tube headers I'll have to program the car and that voids the warranty?

Because of the Magnuson and Moss Warranty act of 1975, you can keep your warranty with aftermarket parts. The warranty act states that even if you put aftermarket parts on the car, as long as they do not do damage to any other existing warrantied part from the manufacturer, you will keep your warranty.

Lets say you do install a short shift kit though, and there seems to be a transmission problem down the road. The dealership CAN in fact say they can void a warranty, but it will not be on the whole car... They can specific which warranty they will void (aka just the transmission), because they have PROVED without a shadow of a doubt, that the short shift kit, or whatever it may be, caused the damage.

I hope that clears things up... Install headers, get a tune and a cat-back, and if the dealership even mentions voiding a warranty because you did this, you can tell them that even mentioning that what I did can void a warranty, because of the Magnuson and Moss warranty act, is illegal. Yes, that's true... I'll say it again, if the dealership says they are going to void your warranty (if nothing is wrong), it is ILLEGAL to say so.

[toehead93]

Originally Posted by caverman

BTW: if you got the 14379 for $90 you got what looks like a good deal. I can only find it for $120. I'm going to make some calls in the next day or so and see if they make a non-polished version for about $90 and/or find out what the differnce is between that one and the 11386.

I got the 11386 muffler shipped for $89 from JDP Motorsports (member vendor). Best deal I found!
11386 is the muffler used on the Competition cat-back according to MAgnaflow support. Looking at the website the 11379 is 3" shorter.

[caverman]

Originally Posted by toehead93

I got the 11386 muffler shipped for $89 from JDP Motorsports (member vendor). Best deal I found!
11386 is the muffler used on the Competition cat-back according to MAgnaflow support. Looking at the website the 11379 is 3" shorter.

Did you put it on yet? I'm assuming with a muffler delete? If so...how do you like it? Any sound clips by chance?

[2010SSRS]

Originally Posted by RCPW

Why Don't Shorty Headers Provide ANY Performance?
So Your Saying That The Stock Exhaust Manifolds Are Better Than Shorty Headers?

I dont know if I believe that at all.

When I installed JBA Shorty Headers on my Dodge Dakota 4.7L it Made a Huge Difference, Just Look at those Skinny Rails they were using for Manifolds Compared to the Headers, Now I dont know what a Stock Manifold looks like off of a 6.2L LS3, I Would Love to See 1 or Both Sides if anyone would happen to have a couple pictures of theirs that they could upload for us I'd love to check them out to see what they look like.

But when I installed them on my vehicle they certainly made a difference for me and even made more of a difference when I installed a SuperChips Tuner.

on you Dodge Dakota yes, i'm sure the difference was huge (mostly low end) as ur Dakota was never designed for performance. the Camaro however was designed for performance and while i'm sure there are low single digit HP gains on the Camaro with some shorties...........the HP/$$$ table is so rediculous that i say 0 gain.......

don't mean to offend........just my opinion..

enjoy ur shorties!

[VADER SS L99]

Originally Posted by RCPW

Why Don't Shorty Headers Provide ANY Performance?
So Your Saying That The Stock Exhaust Manifolds Are Better Than Shorty Headers?

I dont know if I believe that at all.

When I installed JBA Shorty Headers on my Dodge Dakota 4.7L it Made a Huge Difference, Just Look at those Skinny Rails they were using for Manifolds Compared to the Headers, Now I dont know what a Stock Manifold looks like off of a 6.2L LS3, I Would Love to See 1 or Both Sides if anyone would happen to have a couple pictures of theirs that they could upload for us I'd love to check them out to see what they look like.

But when I installed them on my vehicle they certainly made a difference for me and even made more of a difference when I installed a SuperChips Tuner.

I read on a mustang 3v 4.6 (different car i know, but same concept) where the shorties gained only 1rwhp and 1rwtq. Which meens it probably gained nothing because most people see a difference of 1rwhp from run to run. In some part of the rev range it did gain as much as 10rwtq but who wants to throw down $1000.00 for 10rwtq somewhere in the rev range and gain absolutly no peak power. Becuase of the mpg and hp wars you are going to see less and less gains from aftermarket bolt ons becuase the factory is making them so much better. I can remember when you would always see a gain with a catback. The fact that you could get a 01-02 F-body to 400flywheel hp with just bolt ons is staggering. There is no way you could gain 100 hp with non FI or juice bolt ons on these new ones. Point is that without getting into the motor or going FI you are just not going to see gains that we were used to with the older cars.