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AFR 205 Heads
2 Attachment(s)
My new 427W engine from (Keith) Craft Performance Engines came with these heads, and there are two exhaust flange mounting holes. Inner holes 2" apart, and outer 3" apart.
I'd rather use the outer holes so the header tubes won't have to be crimped in because the bolts are so close. But I've found the outer holes are shallower, about 5/16" deep vs. the inner holes at 1/2" deep. The bolt size is 3/8". The AFR flange bolts I have are 1" under the head and they bottom out on the outer holes. I worry about the shallower holes having to support the weight of the header and sidepipes... Has anyone else tackled this dilemma? |
5/16 thread engagement is sufficient
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Where the shallower holes meant for studs?
Mark |
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I never noticed that the outer holes are shallower. I used studs in my AFR's just for ease of taking off and installing the headers.
Matt |
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