Honda B Series High Compression forged piston and ring set; OK for use with small nitrous systems. 3.346 (85mm) bore 3.504 stroke 5.394 rod 1.181 compression height; top ring groove 1.0mm; 2nd ring groove 1.2mm; oil ring groove 2.8mm; Dome 3.8cc; weight 262 grams; high strength forged piston and ring set for use in high performance and racing engines. 12.5-1 compression ratio with 42.7cc head; Set includes 4 pistons; piston rings; locks and wrist pins. Part number Ross 99865
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