SRT4 NEON CNC PORTED BUILT CYLINDER HEAD CROWER SPRINGS RETAINERS OVERSIZED VALVES. Srt4 neon 2.4 JM cnc ported cylinder head with Crower valve springs and retainers. +1mm +2mm oversized exhaust and intake valves. This head flows very well and has only about 200 miles on it and a couple hours of dyno time. Message me for any questions you might have. This head can flow some serious amount of air. Stock block and 6766 turbo it made 648 hp with no problem. Clutch wouldn't hold so had to end the dyno session. JM is known for porting Viper Striker heads and did a wonderful job porting this beast. The item…