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Best headers/y pipe for an eps cam...?

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Old Nov 10, 2010 | 12:02 AM
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Default Best headers/y pipe for an eps cam...?

Alright, decided on getting the EPS 264/246 cam.

http://www.engpwrsys.com/index.php?a...d&productId=10

There's the link to it. I've heard stepped headers are better for a bigger cam to make more power than basic longtubes but is it true? I really want the hooker longtubes for my gmmg but will the stepped headers make that much of a difference? Also, whats the difference between stepped and longtubes? And what's a good catless Y pipe to go with the headers to my gmmg mufflers? Thanks!
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Old Nov 10, 2010 | 12:10 AM
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Stepped headers get larger from the flange to the collector if I'm not mistaken.
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Old Nov 10, 2010 | 12:26 AM
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stepped headers are better for running open headers. Just get a set of 1 7/8" ARH and be done with it.
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Old Nov 10, 2010 | 03:46 PM
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Originally Posted by 98Aggie
stepped headers are better for running open headers. Just get a set of 1 7/8" ARH and be done with it.
Alright thanks. I'll put cutouts on but those wont be open too much. Are the ARH headers stepped or just basic longtubes? As far as longtubes go I'm really leaning towards hooker because I love the way they sound with a gmmg and catless y.. unless you can point me some place with a good sound clip of the arh headers with a gmmg catback...

Last edited by 1Psycho; Nov 10, 2010 at 04:15 PM.
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Old Nov 20, 2010 | 11:09 AM
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t t t
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Old Nov 20, 2010 | 11:24 AM
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Originally Posted by 1Psycho
Alright thanks. I'll put cutouts on but those wont be open too much. Are the ARH headers stepped or just basic longtubes? As far as longtubes go I'm really leaning towards hooker because I love the way they sound with a gmmg and catless y.. unless you can point me some place with a good sound clip of the arh headers with a gmmg catback...
dunno if there's a clip on there, but check out ls1sounds.com
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Old Nov 20, 2010 | 12:10 PM
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I hope you meant 234/246, and if so, that sounds like a killler cam...
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Old Nov 22, 2010 | 02:43 AM
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Headers are headers there all gonna sound the same, that is unless the merge is crappy. Your gonna be paying for fit, quality, and material. I personally went with kooks longtubes and ory, I live in the midwest and loove to drive in all weather so stainless was a must. They fit like a glove, install took less than an hour for me, I had a car lift tho.
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Old Nov 22, 2010 | 03:15 AM
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since u r obviously not worried about smog u should get the TSP 1 7/8 race style headers and the TSP y pipe. great stuff at a good price. than take off your whole AIR and EGR setup and smog pump cuz u will not need it and lose some pounds off your car. it will make your engine bay look nice too.
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Old Nov 24, 2010 | 03:19 PM
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I just ordered a set of TSP 1" 7/8 LTs and off-road y-pipe yesterday. Hopefully I can get them installed by next weekend. I plan on putting a cam in this summer so these should accent it nicely.
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Old Nov 24, 2010 | 08:11 PM
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That cam according to the link is:
"Designed For 5.7 to 6.2 Liter Engines With Stock Or Stock Type Intake Manifolds"... (and Cathedral Port Heads.
Extensive Computer Tuning Required. Broad Power Band.
Dual valvesprings recommended.
1500 to 7200 RPM Operating Range.)

Why match headers up with a exhaust intensive cam designed for restrictiive exhausts? In theory, that cam should not respond as well as alternative designs to headers of any type. What am I missing?
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Old Nov 24, 2010 | 08:34 PM
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Originally Posted by Darkman
That cam according to the link is:
"Designed For 5.7 to 6.2 Liter Engines With Stock Or Stock Type Intake Manifolds"... (and Cathedral Port Heads.
Extensive Computer Tuning Required. Broad Power Band.
Dual valvesprings recommended.
1500 to 7200 RPM Operating Range.)

Why match headers up with a exhaust intensive cam designed for restrictiive exhausts? In theory, that cam should not respond as well as alternative designs to headers of any type. What am I missing?
intake manifolds it says, not exhaust manifolds....
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Old Nov 24, 2010 | 08:37 PM
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I wouldn't say this is designed just for restrictive exhaust, but I more or less agree. All of the EPS grinds have somewhat wide splits with generous exhaust duration and lift. They are just trying to make sure there is good enough flow out of the head for high RPM... if you have great exhaust valves, ports, and exhaust system then consider asking them about a custom grind with less exhaust duration and see what they say. But I bet the opinion of the cam guru at EPS, with OEM style heads he would prefer that ratio of intake to exhaust duration.
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Old Nov 24, 2010 | 08:51 PM
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Originally Posted by xpndbl3
intake manifolds it says, not exhaust manifolds....
I am not illiterate, I just can't read.
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Old Nov 24, 2010 | 08:56 PM
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Originally Posted by Darkman
I am not illiterate, I just can't read.
new sig.
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Old Nov 24, 2010 | 08:58 PM
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Originally Posted by HAZ-Matt
I wouldn't say this is designed just for restrictive exhaust, but I more or less agree. All of the EPS grinds have somewhat wide splits with generous exhaust duration and lift. They are just trying to make sure there is good enough flow out of the head for high RPM... if you have great exhaust valves, ports, and exhaust system then consider asking them about a custom grind with less exhaust duration and see what they say. But I bet the opinion of the cam guru at EPS, with OEM style heads he would prefer that ratio of intake to exhaust duration.
I based my on conclusion in part on my misreading of the information behind the link (see post above) - but I do have an EPS cam (speced by PartickG, supplied & checked by Geoff Skinner) that is 219/230 and the stated reason for that spiit was that I am using it with stock exhaust manifolds.
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Old Nov 24, 2010 | 10:46 PM
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what heads and intake are you running?how or who is tuning it?what about emission testing?the biggest cam is not the fastest cam if matched with the wrong parts.
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Old Nov 25, 2010 | 08:51 PM
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Originally Posted by garygnu
what heads and intake are you running?how or who is tuning it?what about emission testing?the biggest cam is not the fastest cam if matched with the wrong parts.
stock heads and stock manifold/throttle body with the exception of a K&N Intake. Not gonna blow thousands of dollars on nice heads and a FAST manifold so the only other things id probably do is an ls6 manifold and maybe port the throttle body and heads. Gonna have it dyno tuned probably on a mustang dyno (closest one to me) and I'm not worried about emission testing until I have to cross that path in a year and a half.
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Old Nov 28, 2010 | 01:30 AM
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.bump
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Old Nov 29, 2010 | 05:33 PM
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Anyone?
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