High-performance, cast pistons closely match original equipment Engineered for the best possible heat transfer from combustion chamber to cylinder walls Rings are replacement for one piston All pistons are priced with ring(s), wrist pins and circlips - Ski-Doo Elite 464ER L/C (1982); Ski-Doo Formula MX (1986, 1988, 1991, 1985, 1987, 1993, 1989, 1990, 1992); Ski-Doo Formula MX II (1993); Ski-Doo Formula MX-LT (1990, 1989, 1987, 1988, 1986); Ski-Doo Formula MX XTC R (1992, 1993); Ski-Doo Safari LCE (1992, 1991); Ski-Doo Safari GLX (1992, 1991, 1990); Ski-Doo MX (1994); Ski-Doo Everest 444 E L/C (1979, 1978); Ski-Doo Elite 444 E L/C (1980, 1978); Ski-Doo Everest 464E L/C Electro (1983, 1981, 1980, 1982); Ski-Doo Formula MX X (1991); Ski-Doo Safari LC (1990); Ski-Doo MX-Z Formula (1993); Ski-Doo Formula MXE XTC (1991); Ski-Doo Formula SS (1985); Ski-Doo Formula SP (1985, 1986); Ski-Doo Formula MX XTC (1991); Ski-Doo Formula MXE (1991); Ski-Doo MX-Z 467 (1994); Ski-Doo SS25 (1984)