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post #1 of 5 Old 01-19-2015, 09:59 PM Thread Starter
WannaYJ
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AFE twisted header

Has anyone installed an AFE twisted header on a 90-95 YJ with a 2.5 4 banger? I was curious to hear pros and cons.My 94 has an exhaust leak and was going to forgo the standard exhaust manifold replacement, and go with a header,

The AFE header looks stout and priced right Any comments would be appreciated.Thanks

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post #2 of 5 Old 01-19-2015, 10:48 PM
Luuca
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Quote:
Originally Posted by WannaYJ View Post
Has anyone installed an AFE twisted header on a 90-95 YJ with a 2.5 4 banger? I was curious to hear pros and cons.My 94 has an exhaust leak and was going to forgo the standard exhaust manifold replacement, and go with a header,

The AFE header looks stout and priced right Any comments would be appreciated.Thanks
As a replacement, I'd look at anything made well and out of stainless. You will not see any marked imprvement in performance out of the headrs unless you go through and modify the rest of both the intake side and exhaust side of your set up - including fuel injectors.

I question if the expense of a set of good headers is worth it over a servicable set of stockers. Sure you get the look, and some improved flow and weight savings, but it's not going to help all that much over the originals.

I'm fairly sure Davey's or CFOffroad would have a used set of exhaust heads for a fraction of any worthwhile tube headers.

91 YJ "Alice" 4.0L, AX-15, NP 231 w/HnT Flange, Adams Driveshafts F/R, 2.5" OME 36Rs, 5/8" /f12 Booms, 32" Yoko ATs, 4.10 D30/35 Aussie Lockers F/R Busted Knuckles YJOTM never
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post #3 of 5 Old 01-20-2015, 05:44 AM
Cobra Jeep
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I have a afe twisted steel on my 4.0. I replaced a cracked cheap aftermarket header that replaced my factory header.
I don't know about the 4 cyl version, but the 6 cyl is definitely thicker and better built. The one I have is all stainless steel, tig welded, bends are nice and smooth, ports look good, flange is nice and thick and lines up good. You could tell a noticeable difference in the weight of it compared to the cheap one. It weighs a lot more cause there is more metal there. Tubes are noticeably thicker. I could tell a ever so slight difference in performance Vs. the cheap aftermarket one.
I bought mine about a year ago and it looks like prices have went up a good bit. I got mine on amazon for like $385. Looks like they have went up about $200, ouch.

'93 YJ 4.0L, AX-15, NP-231HD/SYE, 8.8in rear, OME 2.5 lift, home made front hub conversion, hydroboost. Warn M10000 winch. Currently building a stroker.

'79 Cherokee Chief, 401 MPFI fuel injection, T-18/D-20 and hydroboost. Otherwise stock.
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post #4 of 5 Old 01-20-2015, 12:12 PM Thread Starter
WannaYJ
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Thanks Luuca for the input about the Twisted headers!!
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post #5 of 5 Old 01-20-2015, 01:19 PM
Luuca
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Quote:
Originally Posted by WannaYJ
Thanks Luuca for the input about the Twisted headers!!
No worries. If you'd like to see all the 2.5l mods you can/would have to do in order to get the most out of a set of header do a forums search for 2.5l power increase.

Posted via my pretentious iPhone.

91 YJ "Alice" 4.0L, AX-15, NP 231 w/HnT Flange, Adams Driveshafts F/R, 2.5" OME 36Rs, 5/8" /f12 Booms, 32" Yoko ATs, 4.10 D30/35 Aussie Lockers F/R Busted Knuckles YJOTM never
05 LJ Rubicon "Ghost"

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