American Racing Headers Long Tube Headers for the Jeep Wrangler TJ 4.0
- Thread starter Chris
- Start date
cabech984
New Member
Thanks for these clips! Sounds badass! Too loud through that muffler for my liking
psychoticpinkbunny
New Member
I'm glad someone else posted a sound clip - I've run into issues with fitment on my 05
psychoticpinkbunny
New Member
I'll just put it out there, I have a RHD - Not that it should matter?
The 3 bolt holes in the middle flange aren't lining up with the cylinder head and the inlet manifold is also catching on the middle flange.
psychoticpinkbunny
New Member
Yeah it wouldn't make sense for Jeep to change the cylinder bolt pattern by a couple mm.
The header is bolted down at either end (tight but not torqued)
Left bolt hole:
Middle bolt hole:
Right bolt hole:
They are all out by 3-4mm, which is just enough to stop any bolts going in.
Then the next issue is the inlet manifold catching on the headers, again that middle flange:
Just spoken with my local workshop, they are happy to ream (?) out the holes for me and trim the flange
That's crap. Makes you wonder how much the exhaust ports are off from the primaries. Did you contact ARH?
psychoticpinkbunny
New Member
Tell me about it, I'm about to measure everything.
Yup, first thing I did after speaking with Summit and while a friendly chap at ARH, he was trying to convince me there are differences between LHD and RHD engines.
Will try reaching out to them again today once I have all the measurements as the workshop change would be my last resort.
There are most definitely not differences in the cylinder heads for LHD vs RHD. That's kinda crazy he would even suggest that. I was planning to install mine in the coming months. I think I'm going to mock it up on a spare head before I start tearing everything apart now.
psychoticpinkbunny
New Member
Measurements if anyone is interested:
Head exhaust ports
V= 27mm
H= 30.7mm
ARH ports
V= 46.4mm
H= 41.8mm
Using the gasket (which lines up with the head perfectly) you can see the fitment issue:
Head exhaust ports
V= 27mm
H= 30.7mm
ARH ports
V= 46.4mm
H= 41.8mm
Using the gasket (which lines up with the head perfectly) you can see the fitment issue: