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By comparison, the Twisted Wedge chamber of Trick Flow’s 170 casting is only slightly smaller (61cc), but it’s loaded with much larger valves (2.02/1.60) that are repositioned directly above the cylinders. The improved valve angle also changes the shape of the chamber, which in turn, greatly improves airflow and the big bang of combustion. This cylinder head is ideal for predominately stock street ’Stangs, as it comes with C.A.R.B. credentials (for Golden State enthusiasts), and can be bolted directly onto stock short-blocks as long as camshaft lift is limited to 0.550 inch.