AMC 390 pistons. Hypereutectic step dish piston and ring set.
These pistons are for use in: .040 over bore of 4.205 | stock 3.574 stroke | stock length 5.858 rod | stock size 1.000 wrist pin | 1.560 compression height | top ring groove 5/64 2nd ring groove 5/64 oil ring groove 3/16 | Step Dish 28cc | piston weight 532 grams | pin weight 157 grams
High strength hypereutectic piston set for use in high performance engines. Can also be used as stock replacement pistons. Set includes 8 pistons; 8 wrist pins; piston ring set and lock rings.
KB Part number KB418ktm.040