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25" w/129" Track | 1997 Polaris LITE 340 | 2008 Ski-Doo GSX 600 H
GTX 1500 Wakeboard Edition : 2005-2004-2003-2006-2007
Softail Fat Boy EFI FLSTFI : 2016-2017-2015
2001 Yamaha YZ250F 2002 Yamaha YZ250F 2002 Yamaha WR250F 2001 Yamaha WR250F
Cylinder Heads - Twin Cam4159 Rear Belt 25" w/129" Track | 1997Caracteristicas: High port flow gives great performance now, and more later when additional upgrades are done Heads are fully assembled with springs and valves Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications 79cc heads work great with stock motors for 88" to 103" motors; 89cc heads work best for motors over 103" or with high compression pop up pistons