ITEM: Piston Ring Compressor AVAILABILITY: In stock APPLICATION: See below PRICE: $35 each PURCHASE: Click Contact button These ring compressors will greatly simplify piston installation.  They come in three sizes.  Made from 6061 Aluminum and anodized. Silver - 88 mm bore (fits 86 to 90 mm bore size) Green - 92 mm bore (fits 90 to 94 mm bore size) Red - 96 mm bore (fits 94 to 98 mm bore size) Nichols Piston Ring Compressors ($35 each)