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exhaust header recommendations

Performance mods and Advanced Stroker discussion.
massholetim
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Re: exhaust header recommendations

Post by massholetim » August 8th, 2016, 10:36 pm

Thanks for everyone's input I ordered the borla headers I will let you know how they perform

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Cheromaniac
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Re: exhaust header recommendations

Post by Cheromaniac » August 9th, 2016, 4:13 am

massholetim wrote:Thanks for everyone's input I ordered the borla header I will let you know how it performs
There, fixed it 4U. On an I6 there's only one header. ;)
1992 XJ 4.6 Stroker - 5MT - 202rwhp/258rwtq - Sold 13/12/2016 :cry:
Stroker build-up, Stroker "recipes"
2006 Mustang 4.6 GT - 5MT
- 311rwhp/328rwtq - Midlife crisis car :D
A few bolt-ons

nicpaige
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Re: exhaust header recommendations

Post by nicpaige » August 12th, 2016, 5:17 am

Yep only one header but still more expensive than two. LOL

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SilverXJ
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Re: exhaust header recommendations

Post by SilverXJ » September 4th, 2016, 6:08 pm

nicpaige wrote:Yep only one header but still more expensive than two. LOL
Lol.. price out a Doug Throley for the ZJ 5.2/5.9L engine.

VooDuuChild
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Re: exhaust header recommendations

Post by VooDuuChild » September 16th, 2016, 8:26 am

LOVE my Banks header. Bought it back in 2004. Cracked in 2015, sent in pic, lifetime warranty, pro-rated for length of ownership...new Banks header was 50% off. So, spend more once, then when it cracks again, like most all headers will after abuse and only pay as much as you would for the chinese crap, but still getting a Banks. Ours is the torque tube YJ 4.0 header.

Shapoopie99
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Re: exhaust header recommendations

Post by Shapoopie99 » November 4th, 2016, 4:38 pm

I got a flowdaddy SS from Rusty's . I'm quite happy with its quality and fit and finish. It's only been on for 200 miles so I'll have to re-evaluate when more miles are on but no problems yet.

http://www.rustysoffroad.com/jeep-perfo ... aders.html

GreenYJ
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Re: exhaust header recommendations

Post by GreenYJ » November 14th, 2016, 5:49 pm

I ran a pacesetter long tube on my YJ for 120k before the y - pipe started leaking from rust. Replaced it with another pacesetter long tube. Seems like it helps the low speed torque a lot. Anyone else used one of these?
1994 Sahara YJ

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Comanche91
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Re: exhaust header recommendations

Post by Comanche91 » January 9th, 2017, 2:09 pm

I'm running a Mike Leach header I purchased many years ago (late 90's as I recall) from Kolak. Got a good price break too since at the time it hadn't been test fit on an MJ before. :mrgreen: It's been through three engines, and is now doing duty on my 91 MJ stroker. Arguably the best flowing header ever produced for the 4.0 platform. Too bad someone never reproduced these, they were works of art......

Image

Image
91 Comanche LWB, AW4, Hesco 4.6L, D44 Trac-lok, CHROME freak, ROLL TIDE

kaspbrochill
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Re: exhaust header recommendations

Post by kaspbrochill » January 11th, 2017, 9:00 pm

Are you keeping the your factory design of the O2 senor's and pre-cat's or do you have a good tune to by pass them through the PCM and running the pre 00' design?

Honestly, the best for a 4.7 stroker would be custom long tube headers; otherwise the best Hi flow, performance header's would probably be Doug Thorley or Borla (million mile warranty!); but they are definitely the priciest. Next in line would be AFE, JBA, Banks, Gibson.

http://www.quadratec.com/products/17601_05_07.htm

http://www.quadratec.com/products/17121_0201.htm

http://www.quadratec.com/products/17601_151X_PG.htm

http://www.quadratec.com/products/17601_501_07.htm

http://www.quadratec.com/products/17666_102_07.htm

Header's hands down net you the most HP in a non-aspirated motor so with a 4.7 stroker you definitely need quality header's and I would highly recommend getting a local exhaust shop to make you custom piping for a full 2.5" full exhaust back to allow that motor to breathe and get it's full potential. Magnaflow has the highest flowing rating cat's, which contrary to most people belief's of deleting their cat's you actually want a Hi flow to give you the proper back pressure for the best performance. The for a Hi flow muffler, it's more or less personal preference what kind of tone you want..personally I like the throaty deep tone of Flowmaster 40 or 44 series.

Also you should definitely consider a bigger throttle body with a 4.7. Hope this helps!

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Re: exhaust header recommendations

Post by kaspbrochill » January 11th, 2017, 9:04 pm

Comanche91 wrote:I'm running a Mike Leach header I purchased many years ago (late 90's as I recall) from Kolak. Got a good price break too since at the time it hadn't been test fit on an MJ before. :mrgreen: It's been through three engines, and is now doing duty on my 91 MJ stroker. Arguably the best flowing header ever produced for the 4.0 platform. Too bad someone never reproduced these, they were works of art......

Image

Image
Ahh nice!! Mike Leach isn't making making header's anymore because I actually looking for ML header's for my niner and Kolak informed me they aren't in production but Doug Thorley is currently the one producing header's for the V8 ZJ's and I picked up a set of DT's along with Kolak's full 3" custom exhaust and damnnn they are phenomenal!

Russ Pottenger
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Re: exhaust header recommendations

Post by Russ Pottenger » January 12th, 2017, 8:34 am

Under no circumstances you should ever wrap a header on a street application. The header wrap holds in moisture. A better choice is to get a header that is ceramic coated.

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SkylinesSuck
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Re: exhaust header recommendations

Post by SkylinesSuck » January 12th, 2017, 2:37 pm

I am very pleased with my Doug Thorley header. I converted to the newer dual outlet style as well. Very noticeable mid range and top end gains. The only thing I wasn't happy about was the small size of the collector outlets. My TJ is having a custom 3" exhuast made as we speak and I asked them to hog out the outlets as much as they felt comfortable doing.


And whomever said something about wanting backpressure, that is bad info. Please stop spreading it. Backpressure is always, 100% of the time bad. Exhaust gas velocity and scavaging are good. Overly large pipes can hurt low end velocity and exhuast gas scavaging, which it's where that whole myth came from.

jimzamp
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Re: exhaust header recommendations

Post by jimzamp » February 1st, 2017, 5:30 pm

The point made about a high flow cat however is not bad.There have been lots of Dyno tests that have shown high flow cats cause you little or no HP loss.Get a Magnaflow high flow metal core cat,clean up your exhaust so the guys behind you on the trail are not huffing you carbon monoxide.You wont have hassles with inspections and in some states they impound your rig.I have been running one on my 1990 yj for 15 years and pass emissions inspection every year. Check it out for your self.( https://www.youtube.com/watch?v=_hREmy9mEvs )

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SkylinesSuck
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Re: exhaust header recommendations

Post by SkylinesSuck » February 2nd, 2017, 4:29 am

Running a cat is good and barely restricts the exhaust at all. I agree and everyone should run one. Read what I typed. Back pressure is bad. People keep repeating how engines need a little back pressure because they heard it somewhere but have no proof or real idea what they are talking about.

A good free flowing cat adds very very little back pressure, so everyone should run one.

ROWlegend
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Re: exhaust header recommendations

Post by ROWlegend » April 13th, 2017, 5:49 pm

So i am looking at the Pacesetter header too. Anyone else have good luck with it?

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