I am in the process of installing a new engine in my 1999 SR5 4Runner with the 3.4L engine. I found a set of TRD long tube headers to install while the engine is out. I would like to replace the manifold studs and bolts in the header collector with ARP stainless steel hardware. However, they don't show a listing for this application. Has anyone used ARP fasteners for their TRD header install? If so, do you know the part number for the correct kit for both the manifold studs and collector connection? Saw a post where someone indicated they bought ARP 400-8001 manifold studs BUT also stated the insert into the manifold was a bit long and they had not installed them yet so could not comment on fitment.
ARP stainless TRD header stud replacements 3.4 L
- Thread starter Topgun
- Start date
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gamefreakgc
Elite Member
Any particular reason why you want to replace them? I have aftermarket headers and the stock studs have been just fine.
A couple of reasons: (1) installing these long tube headers can be a PIA. Therefore, I want to do everything I can to insure I only have to do it once. (2) I hate exhaust leaks. (3) I want high strength / heat treated connectors (4) The factory exhaust manifold studs have a shoulder in the center that could possibly interfere with proper header tightening.... they were not intended for headers and while the might / probably would work, I do not want to take any chances (see 1-3).
I have already invested way more time & money in my rebuild than originally budgeted and am not yet finished with my build (which is typical of my rebuilds). Plan to keep this rig so figure the cost of new manifold studs is a good investment.
I have already invested way more time & money in my rebuild than originally budgeted and am not yet finished with my build (which is typical of my rebuilds). Plan to keep this rig so figure the cost of new manifold studs is a good investment.
Scramble
New member
Never heard of them, but ARP might be overkill for this aplication. Not that I have anything against overkill. I use the ARP Lexus wheel studs & was gonna get the ARP studs for the TRD S/C but the price was rediculous from Paradice Racing so I bough the LCE ones for 1/3 the price. If you know the length & thread pitch you can order generic ones from ARP.
