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Lets say I'm going to build a 103ci engine for a bagger. I'm looking for torque from 2000 rpm up SE HTCC heads are 83cc combustion chambers with HTCC pistons 10.5-1 compression, SE pro heads are 76cc combustion chambers at 10.5-1 compression. Using the same cam, TW-6. I know what heads flow more, are the larger heads with the bigger chambers better in the high rpm range. I hope I explained this right.
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