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3.Unlike the Street Wedge head by Trick Flow, the Track Heat head is not 50-state-legal. Because we aren't building a smog-emissions-legal combo, we decided to increase the compression. We're not afraid of running race gas, so we employed JE Pistons to provide us with a premium slug to fit the killer Trick Flow Twisted Wedge heads. The JE CNC-machined piston is equipped with all the latest tricks. An anti-detonation groove, ring pressure groove, barrel-faced skirt taper, and deep drag valve pockets provide maximum performance. This allows us to push the awesome combustion chamber design of the Twisted Wedge heads. This piston also has the pin journal in the ring land to make room for the 5.400-inch rod length. The long rod corrects the rod-to-stroke ratio when the longer stroke is used.