400 HP With A Stock Cam!
The AFR heads have CNC-machined 60cc chambers with oversized 1.90/1.60-inch stainless steel valves, which are the largest that will generally clear the valve reliefs in the stock pistons and a mild camshaft without modification. These heads should be good for a camshaft up to about 220 degrees of duration at 0.050-inch lift without any piston-to-valve clearance issues, but it's always a good idea to double-check. View Related Article
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