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
Member
I'm glad someone else posted a sound clip - I've run into issues with fitment on my 05
psychoticpinkbunny
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
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
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
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:
psychoticpinkbunny
Member
Been awhile since I updated my situation, so here goes:
To be 100% certain the gasket I ordered wasn't an issue too, I bought a copper gasket from NewComer Racing, which fitted the block like a glove.
Had the machine shop use the copper gasket as a template and they re-drilled the holes on the headers.
Perfect!
Onto the next issue, the stock inlet manifold didn't fit.
I ended up taking a angle grinder to the inlet manifold in a couple of places...
I was going to continue fitting up the SC, but I needed the TJ while the other car was out of action, so ended up putting everything back together for the time bring.
Don't know why, but went with a aFe 3" cat back.
The whole system has had about a month to settle and these are the results:
Cold Start:
Snap, crackle & pop:
Warm start & drive:
Slow(ish) drive:
To be 100% certain the gasket I ordered wasn't an issue too, I bought a copper gasket from NewComer Racing, which fitted the block like a glove.
Had the machine shop use the copper gasket as a template and they re-drilled the holes on the headers.
Perfect!
Onto the next issue, the stock inlet manifold didn't fit.
I ended up taking a angle grinder to the inlet manifold in a couple of places...
I was going to continue fitting up the SC, but I needed the TJ while the other car was out of action, so ended up putting everything back together for the time bring.
Don't know why, but went with a aFe 3" cat back.
The whole system has had about a month to settle and these are the results:
Cold Start:
Snap, crackle & pop:
Warm start & drive:
Slow(ish) drive:
That's a stock cam, right?
Might have to order me a one of those gaskets. Did ARH ever do anything to remedy the issues you had?
Might have to order me a one of those gaskets. Did ARH ever do anything to remedy the issues you had?
psychoticpinkbunny
Member
Yup stock cam.
Re ARH, no they ignored my last attempt at getting in contact with them. I've spoken to a few people who have had negative dealings with them and their quality of work.
A couple of the ports don't line up? And some bolt holes?
Please update us in a few months on that copper gasket.
psychoticpinkbunny
Member
3 bolt holes in the central area, the flange and piping bend (again in the central area) obstructing the inlet manifold.
Almost like the central part of the headers were out of alignment on their jig...