Help With New Exhaust Setup

Decue212 · 03-06-2008, 09:47 PM

Ok i recently bought an automatic '04 GT .

It has 2 flows under it already and from watching videos on Youtube, I really like how the Mac Prochamber sounds when combined.

This is the One i was looking at:
http://www.speedconcepts.net/product...roducts_id=109

Now my question is:

I live in Texas, so i need my Cats, Do i have to order some also? Or can i just buy this mid pipe, and use the stock cats?

I want to get it welded on cause i heard that just bolting it on tends to lead to leaks faster than when having it wleded, can i even get this welded?

So basically, how i see it in my head is: I buy the prochamber and the o2 extenders, and take it to a shop and they weld it on real quick and boom, i enjoy, is that how its supposed to go?

*ALSO
I got this car for a 5 year payment, so i cant really change out the headers or put a cam on it cause it will void my warranty, so im also wandering will this fit my stock headers?

*03gtmustang* · 03-07-2008, 07:13 AM

You can get the prochamber welded together, but to not weld it to the stock manifold or catback. Why not just buy a catted prochamber though? http://dagostinoracing.com/index.php...oducts_id=7216

bassman97 · 03-07-2008, 07:15 AM

Taking out your cats will probably void the warranty also.
Anyway, if the pro-chamber doesn't come w/ cats already on it, then get some aftermarket cats (I like Magnaflows). However, be prepared for people to deny you when it comes to welding them on because a lot of shops don't want to mess around w/ the law like that. Also, O2 extensions are only needed w/ long tube headers but MILs are needed if you plan on running for a while w/o cats.

redfire04 · 03-07-2008, 06:22 PM

Definately just get the catted prochamber like stated above. Don't go cutting a welding a bolt on there is no need. That's why it is called a "bolt-on". Oh headers are not going to completely void you warranty. I have longtubes, off road x pipe and catback and I've had my car worked on under factory warranty twice. Once was to replace a leaking axel seal and another to replace a leaking valve cover gasket. Neither time did they question me about after market parts. They must be able to prove that your after market part caused the problem that you want fixed.

Quote:

Originally Posted by bassman97

Also, O2 extensions are only needed w/ long tube headers but MILs are needed if you plan on running for a while w/o cats.

This is not entirely true. 02 extenders are needed on 04's. I believe the o2 bungs are in a different location than 99-03. You will need MIL's though if you don't have programmer to turn off the rear 02's. I'd get both just in case and if you don't need the extenders sell them. I needed the extenders on my 04 gt when I got my o/r x.

Decue212 · 03-07-2008, 08:05 PM

Sweet, thanx for the inputs fellas.

So i see with the cats, its jumps about $150, how much do yall think i will be looking at with install also?

Yeah i dont know whats all under there, i just poked my head under when i changed the oil and noticed i had to flows, but i do believe its still the stock headers, and mid pipe.

redfire04 · 03-07-2008, 09:26 PM

Install of just a midpipe won't be much. Call around and get quotes...I'd say 75-100 bucks.

Decue212 · 03-08-2008, 07:50 PM

what are the benefits of taking off your cats and leaving them on?

redfire04 · 03-08-2008, 10:51 PM

Quote:

Originally Posted by Decue212

what are the benefits of taking off your cats and leaving them on?

Taking them off = a few extra hp and louder

Leaving them on = a few less hp, quieter, better for the environment and you should be able to pass emissions without question.

Dream · 03-08-2008, 11:27 PM

Quote:

Originally Posted by redfire04

Taking them off = a few extra hp and louder

Leaving them on = a few less hp, quieter, better for the environment and you should be able to pass emissions without question.

possibly 2-3 at the wheels, no more horses then 5 i wouldnt think. commin from some1 who knows some1 that had this happen, you dont want the headache from gettin busted with no cats. keep them on not a big difference really

Decue212 · 03-09-2008, 10:23 AM

yeah im definitely leaving them on, i don't have the tools to keep taking them on and off.

Just wanted to know the difference.

Yeah it sounds ok right now (at about 2-3 thousand rpms) and but im hoping this mid-pipe will bring it out some more.

Decue212 · 03-10-2008, 09:25 PM

One more question,

I have stock headers, so would i need the pro-chamber for short tube headers, or long tube?

PureStang · 03-10-2008, 10:52 PM

short tube...

i have a cattless mac h pipe and had turned off my rear o2 through my xcal2. i pass PA inspection/emmissions with ease. and PA is really really strict with emmissions.

Decue212 · 03-28-2008, 07:32 PM

Ok now im ready to order my Prochamber.

Im having trouble finding one that already has cats on it, so im guessing ill just have to order some high flow cats separately.

Is it worth it to order separate cats, or just use the stock ones?

Again just to clarify, i have stock headers, so i need to order the prochamber for short tube headers?

Anyone know where i can find the best deal? or is AmericanMuscle.com the best way to go?

P.S.
Here is a link also to check out my stang, let me know what yall think about it, and feel free to give suggestions on what should be added next!

http://www.cardomain.com/ride/3041270

03-06-2008, 09:47 PM	#1 (permalink)
Decue212 Junior Member Join Date: Mar 2008 Posts: 7	Help With New Exhaust Setup Ok i recently bought an automatic '04 GT . It has 2 flows under it already and from watching videos on Youtube, I really like how the Mac Prochamber sounds when combined. This is the One i was looking at: http://www.speedconcepts.net/product...roducts_id=109 Now my question is: I live in Texas, so i need my Cats, Do i have to order some also? Or can i just buy this mid pipe, and use the stock cats? I want to get it welded on cause i heard that just bolting it on tends to lead to leaks faster than when having it wleded, can i even get this welded? So basically, how i see it in my head is: I buy the prochamber and the o2 extenders, and take it to a shop and they weld it on real quick and boom, i enjoy, is that how its supposed to go? *ALSO I got this car for a 5 year payment, so i cant really change out the headers or put a cam on it cause it will void my warranty, so im also wandering will this fit my stock headers?

03-07-2008, 07:13 AM	#2 (permalink)
03gtmustang Super Moderator Join Date: Jan 2005 Location: Northern Va Posts: 3,245	You can get the prochamber welded together, but to not weld it to the stock manifold or catback. Why not just buy a catted prochamber though? http://dagostinoracing.com/index.php...oducts_id=7216 __________________ D&D Auto Detailing -Dan

03-07-2008, 09:26 PM	#6 (permalink)
redfire04 Redfire GT Join Date: Mar 2005 Location: St. Louis Posts: 431	Install of just a midpipe won't be much. Call around and get quotes...I'd say 75-100 bucks. __________________ 2004 Redfire GT BBK Longtubes BBK O/R X-Pipe Magnaflow cat back Steeda Sport Springs Tokico HPs Black Bullitts Mach 1 Grill Delete Mach 1 Chin Spoiler Mach 1 Rear Wing Honeycomb Trim Panel Blackout Tails Simco Silver Series Gauge Cluster Awaiting Install: FRPP 4.10s - Trick Flow Diff Cover

03-10-2008, 10:52 PM	#12 (permalink)
PureStang WE ARE PENNSTATE Join Date: Jul 2005 Location: Downingtown/West Chester, PA Posts: 4,954	short tube... i have a cattless mac h pipe and had turned off my rear o2 through my xcal2. i pass PA inspection/emmissions with ease. and PA is really really strict with emmissions. __________________ Brandon J My Ride sig by purestang

03-28-2008, 07:32 PM	#13 (permalink)
Decue212 Junior Member Join Date: Mar 2008 Posts: 7	Ok now im ready to order my Prochamber. Im having trouble finding one that already has cats on it, so im guessing ill just have to order some high flow cats separately. Is it worth it to order separate cats, or just use the stock ones? Again just to clarify, i have stock headers, so i need to order the prochamber for short tube headers? Anyone know where i can find the best deal? or is AmericanMuscle.com the best way to go? P.S. Here is a link also to check out my stang, let me know what yall think about it, and feel free to give suggestions on what should be added next! http://www.cardomain.com/ride/3041270 Last edited by Decue212 : 03-28-2008 at 07:37 PM.

03-07-2008, 07:15 AM	#3 (permalink)
bassman97 blank Join Date: Jun 2006 Location: North Jersey Posts: 1,497	Taking out your cats will probably void the warranty also. Anyway, if the pro-chamber doesn't come w/ cats already on it, then get some aftermarket cats (I like Magnaflows). However, be prepared for people to deny you when it comes to welding them on because a lot of shops don't want to mess around w/ the law like that. Also, O2 extensions are only needed w/ long tube headers but MILs are needed if you plan on running for a while w/o cats.

03-07-2008, 08:05 PM	#5 (permalink)
Decue212 Junior Member Join Date: Mar 2008 Posts: 7	Sweet, thanx for the inputs fellas. So i see with the cats, its jumps about $150, how much do yall think i will be looking at with install also? Yeah i dont know whats all under there, i just poked my head under when i changed the oil and noticed i had to flows, but i do believe its still the stock headers, and mid pipe.

03-08-2008, 07:50 PM	#7 (permalink)
Decue212 Junior Member Join Date: Mar 2008 Posts: 7	what are the benefits of taking off your cats and leaving them on?

03-09-2008, 10:23 AM	#10 (permalink)
Decue212 Junior Member Join Date: Mar 2008 Posts: 7	yeah im definitely leaving them on, i don't have the tools to keep taking them on and off. Just wanted to know the difference. Yeah it sounds ok right now (at about 2-3 thousand rpms) and but im hoping this mid-pipe will bring it out some more.

03-10-2008, 09:25 PM	#11 (permalink)
Decue212 Junior Member Join Date: Mar 2008 Posts: 7	One more question, I have stock headers, so would i need the pro-chamber for short tube headers, or long tube?

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