Re: [AMC-List] Best 258 Header for 79 AMX? 4.0 Year?

[Mark Price <markprice242@xxxxxxxxxxxx>]

I run a modified 91-95 factory exhaust manifold.
It was cracked at the outlet, so I cut it off and ditched the donut and angle. I thne made up a long tapered section to join the front and rear tubes. This ends in a 2.5" diameter pipe runs down and just to the rear of the bellhousing. Then I welded on a collector flange.
  It ended up being a Tri-Y type short tube header with a long 2.5" collector area.
Horsepower? Torque?? I'm not sure. I am sure that it is a very compact design. Very easy to install and remove. It is tucked up tight to the floor in a way few aftermarket exhaust are. It would also be very easy for most anyone with a MIG and basic fabricating skills to duplicate.
  I took pics of it when it was done, but my computer died. I need ot go thru my discs and see if I can find a copy as I've seen this question come up time and tiem again.
  Our speculation on the 91-95 exhaust is 9-10 horsepower over the Renix typ manifold, possibly more. Certainly not less.
  Even in stock form the 91-95 Exhaust Manifold will fit the Spirit chassis.
--
Mark Price
markprice242ATadelphia.net
Morgantown, WV


---- Jesse <j2sax@xxxxxxxxx> wrote: 
> Years ago I had a CLifford header and intake with a
> Holley 390 on a Spirit 258.  It sounded and ran great
> and I never had problem with leakage, however, it hung
> pretty low and was a mega pain to get in and out.  
> 
> With the advent of the 4.0 and it's factory header I
> know a lot of improvements have been made, albeit for
> various Jeep bodystyles.  
> 
> Has any of you found a good 258/4.0 header design that
> doesn't take half-pulling the engine to install?  A
> bud had a 99 in his garage and it was a 2-3 split
> design.  I LIKED the looks of that, but wasn't sure if
> it would work on my car body.  
> 
> A shorty design would work best, but I would rather
> hear from someone who has had experience witha
> particular brand.  
> 
> Thanks, 
> 
> 
> Jesse
> 
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