Subaru EJ20 WRX forged piston and ring set; designed for use in turbocharged engines. 3.642 (92.5mm) bore 2.952 stroke 5.135 rod 1.275 compression height; top ring groove 1.0mm; 2nd ring groove 1.2mm; oil ring groove 2.8mm; Dish -12cc; weight 375 grams; high strength forged piston and ring set for use in high performance and racing engines. 8.5-1 compression ratio with 45cc head; Set includes pistons; piston rings; locks and wrist pins. Part number Ross 99885
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