Exhaust Manifold Differences? 99/01 vs 03/04? Also Pace setters?
Are there any differences between the 2?
I really wanted to go long tubes on our build but I don't think we're going to be able to due to the fact its my wife's daily and i've heard rumors about emissions here getting nasty soon.
If the 03/04's are better than maybe I'll throw some of them on. The X-pipe we have will still work for it right?
I did find some locally NIB Pace Setter long tubes for a 96-04? are they worth getting? They're 150$. I just don't want to spend 600-700 bux on something I may have to take off.
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Matt H.
90 GT, 572rwhp, 523ft-lbs.
04 Marauder, 268rwhp 295tq. A few things..
01 SVT Cobra, 4.30's, Wife's car.
Last edited by Nitrous SSC; 11-06-2009 at 12:03 PM.
Im sure someone will put me in my palce if I am incorrect but to the best of my knowledge the 99/01 exhaust ports are different from the 03/04 so the heards can't swap between the two models. Secondly I have never had experince with Pace Setters but I have yet to hear anything good about them (heard a lot of negative regarding quality/performance) Honestly if you want LTs you need to pony up the cash
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Steeda Underdrive, Steeda Timing Adjuster, Steeda Tri-Ax, 3.73,
American Thunder 40s, JLT RAI, H&R Supersports, Tokico Shocks,
Maximum Motorsport Castor/Camber, SCT Tune by LaSota Racing
Baer D/S Rotors, SS lines, Hawk HPS Pads, Billetflow IRS Brace
Maximum Motorsport Pinion Brace, Maximum Motorsport FLSFCs
Kooks ceramic LTs, Kooks Catted X Pipe
get the headers that are made for YOUR car. they can be interchanged BUT the ports are a different shape. You get what you pay for. I thing MAC makes a good piece for the money. The flange is all one piece making for an easier install than the BBK's and some others. Kooks is one of the best makes but youre gonna pay for it. Power difference between brands is minimal. Alot of what your gonna pay for is build quality. And it is worth the extra money for GOOD FITMENT!
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99 Rio Red Cobra-Built Eaton swapped Street Car
Last edited by SUPERSEXY32V; 11-06-2009 at 02:58 PM.
If the 03/04 exhaust maniforld are any better then the 99/01 that would be frightning LT on a supercharged Cobra are only good for about 10 hp but I imagine the gains on an NA engine would be higher. I would stick with the stock logs.
If I recall there is a difference in the EGR location and the exhaust ports on the 03/04 are bigger, so if you get a set of 03/04 longtubes then the header tubing will just be bigger than your exhaust port, if I recall correctly.
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2001 True Blue Cobra Convertible
1 of 292
#935 built on 4/20/01
You can use 03/04 headers on our cars, but not the other way around. You will also need gaskets for an 03/04. I would, however, recommend you buy something besides pacesetters.
Quote:
Originally Posted by SlowSVT
If the 03/04 exhaust maniforld are any better then the 99/01 that would be frightning LT on a supercharged Cobra are only good for about 10 hp but I imagine the gains on an NA engine would be higher. I would stick with the stock logs.
I just read in a thread yesterday where a guy with a Snakebite Eaton added LT's and gained something like 30 peak hp (25+ under the curve) and 37 rwtq. I only picked up 42rwhp from bone stock to full exhaust with a tune.
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Quote:
Originally Posted by James Snover
With that set up you can teach them the following tricks:
Die.
Die Right Now.
Die Right Freaking Now and Burn, You Eight-Legged Freak From Hell!
I just read in a thread yesterday where a guy with a Snakebite Eaton added LT's and gained something like 30 peak hp (25+ under the curve) and 37 rwtq. I only picked up 42rwhp from bone stock to full exhaust with a tune.
Any claims of headers on a blown 4.6 adding 30 hp should be viewed with a healthy dose of skepticism. I have seen quite a few post regarding big numbers produced by adding headers where the owner neglects a few small details like ignition timing, changing the injector map, air temperture or even if it was run on the same dyno which can have a significant impact on the engine output. Headers will start to shine when the engine output exceeds about 600 hp but below that the improvement is a bit disappointing. I guess after spending $1200 to install a set of headers some people would be a bit embarrassed admitting that they didn't get the results they were hoping for.
One post in particular I remember about 4 years ago in the Terminator section. This guy ran back-to-back "before" and "after" dyno runs along with a tune to optimize the engine output which is the way it should be done (no other modifications were performed on the car) and recorded a dismal 5 hp increase. After enduring a 12 hour install and all the money he spent he was mad as hell and who could blame him. Even MM&FF ran the stock logs against LT's and the dyno graphs pretty much followed one another and the gain was a measly 10 hp. They seem fairly impressed with the gain as they always are but then again they did not pay for the headers nor did they want to offend one of their advertisers.
If this guy actually gained 37 ft. lbs of torque just adding LT's he would be a "first".
Thats why I'm wondering if the 03/04 stock logs are better than the 01's I could run some of them. I just don't want to choke the FR500 cams I'm installing. I've decided on a total port job of the 01 heads vs just getting box stock 03/04 heads. I hope it was a good choice.
I agree that the stock logs for the 03/04's arn't bad at all. I have a friend making 650rwhp through his. Just wana know if they'll fit our 01 and its x-pipe and if they're a different design than the 01's.
Last edited by Nitrous SSC; 11-06-2009 at 11:38 PM.
I agree that the stock logs for the 03/04's arn't bad at all. I have a friend making 650rwhp through his. Just wana know if they'll fit our 01 and its x-pipe and if they're a different design than the 01's.
Tight LSA cams need an exhaust that scavenges well; the FRs have a tight LSA and all the manifolds suck at scavenging.
You can't compare FI and n/a exhaust requirements as they aren't even close to the same.
LT on a supercharged Cobra are only good for about 10 hp but I imagine the gains on an NA engine would be higher. I would stick with the stock logs.
and who could blame him. Even MM&FF ran the stock logs against LT's and the dyno graphs pretty much followed one another and the gain was a measly 10 hp. They seem fairly impressed with the gain as they always are but then again they did not pay for the headers nor did they want to offend one of their advertisers.
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