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i think that the 906, 346, 452 heads are all about 86-88 CCs aren't they? i had never heard 81.5




I went and checked a half dozen sites, all were 81.5 cc for the 902 heads....


3769902 1974 440 400 2.08" 1.74" 81.5cc

http://www.motortopia.com/forums/viewtop.../tp/1#post_3902




they list the 906 at 79.5cc , thats the NHRA blueprint spec . measure what you ACTUALLY have , do not believe everything you read ...




Thanks for the great response!
I guess you missed where I said they were RATED at 81.5cc but most I have actually TESTED were 85-86cc....?

Is there anybody HELPFUL on MoParts left anymore?


CrAzYMoPaRGuY