Cast Iron manifolds on Super Stock cars

[Bruce Fulper]

Originally Posted by 427FE

Some those early Pontiac manifolds were aluminum as well

And they melted rapidly. Pontiac didn't have a good alloy for them . I had a few sets. Melt under the bolt head. Guys would retighten the bolts, squish the flange, loosen, retighten, melt, squish, retighten until junk. Sad. Because the cast iron ones were 78 lbs apiece.