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Joined: Tue Dec 5th, 2017
Location: Michigan, USA
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The TMH headers ..... also fit aftermarket aluminum heads.
They may fit some aluminum heads without modification but not all. Both of my aluminum AFR heads needed a little mill time to provide clearance for the collector on the PS and for the flanged joint in the #5 primary on the DS.
The sides of the original iron head castings have recesses between the external head bolt holes and these accommodate the tightly tucked TMH's. The AFR's have a thicker, flat casting in the same area and that's what causes the interference.
Not a big deal, just something to check for. If your Al heads have a clearance issue like the AFR's, it should be easier to deal with before the heads are assembled to the block.
Last edited on Sat Feb 2nd, 2019 05:12 pm by V8 Level II
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2003 FX4 Level II, Supercharged 5.0L V8, Headers, Duals, BW4406 manual T/C
Aussie Locker, Torsen L/S, 4.10's, Bilstein 7100 rezzies, Cadillac/Mustang rear discs, Duff traction bars
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