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 - Arctic Cat EXT 580 Mountain Cat EFI (1994, 1996, 1995); Arctic Cat Powder Special 580 (1997); Arctic Cat Pantera 580 EFI (2000, 1996, 1997, 2001); Arctic Cat ZR 580 (1995, 1993, 1996, 1994); Arctic Cat ZR 580 EFI (1997, 1996, 1995); Arctic Cat EXT 580 (1996, 1995, 1994); Arctic Cat EXT 580 EFI (1997, 1996, 1995, 1994); Arctic Cat EXT 580 Mountain Cat (1993); Arctic Cat EXT Powder Special (1995, 1996); Arctic Cat ZL 550 ESR Limited (2000); Arctic Cat EXT 580 Mountain Cat - Deep Lug EFI (1995); Arctic Cat EXT 580 Z (1993); Arctic Cat Pantera 580 (1995); Arctic Cat ZL 550 ESR (2000); Arctic Cat Powder Special 580 EFI (1997); Arctic Cat ZR 580 ETT EFI (1996)