Quote:
The closest thing commercially you'll get to what an ITS 240Z motor wants is a Stahl with 1-1/2 primaries. Tell Jere your application. You don't want steps up to 1-3/4, waay too big. Our ARRC's were won with a Tri-Y that had less than 1-3/8 ID primaries, 2 inch OD secondaries, and a single 2-1/2 final. 200+ SAE "East Coast" ponies. Most people have way too much header on their ITS cars (and way way too much on their street cars). Sunbelt's final ITS 240Z motors made 205-208 with a custom, stepped, Tri-Y header. About $1500 might get you one.
I'll have to PM Steve Parrish and see if he's barking up the same trees we did. :)
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Katman