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These heads are relatively new to the market, but are already making some big waves! They flow the big air like the ported GM LS3 castings, but through a 12cc smaller than stock intake runner, which equals VELOCITY! That velocity is power! Also, we laid over the valve angle slightly which helped us get about .040" better than stock piston to valve clearance (before any milling), whilst starting at 68cc chamber volume rather than the 70cc you get from the GM heads out of the box.
So more compression, more power, and better piston to valve clearance are standard options here! Of course we expect people to get more aggressive on cam selection with that extra clearance we've provided, or they can run the more mild duration camshafts and mill the heads some and get better compression!
Let us know if we can help with your combo!
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