What size pipes on Spearco ic kit?

2 1/4. I will double check tonight after I get out of class. I am looking at the instructions or a paper I have in my backpack.

If you're talking about the hotair kit, they're 2.25". The intercooler inlet and outlet is 2.5".
Spearco USED TO make a FMIC! They have discontinued their intercooler for Hot Airs. You can find them used for about $500 or less. You can still buy the intercooler, 2-135. You would have to fab the piping and make an adapter from the intake or just buy a 86-87 intake and mod the upper plenum and drill the oil return hole.



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