Hayabusa Heavy-Duty Valve Springs 65 lbs seat pressure

Hayabusa Heavy-Duty Valve Springs - 47 lbs seat pressure

Heavy Duty Valve Springs - Suzuki GSXR750 (1986 - 1990), GSXR750 (1991 - 1992 shim style), GSXR1100 (1986 - 1990), GSXR1100 (1991 - 1992 shim style).

Valve Springs - Factory GSXR750 Springs for GSXR1000 (2001 - 2004 4mm stems, and 2005 - 2008 4.5 mm stems).

Heavy Duty Valve Springs - Honda CBR600F2/F3.

Heavy Duty Valve Springs - Honda CB750 SOHC (K model).

Heavy Duty Valve Springs - Honda CB750, 900, 1100F DOHC, thru 1984.

Heavy Duty Valve Springs - Yamaha R1 (1998 - 2003).

Heavy Duty Valve Springs - Yamaha FJ1100/1200.

Heavy Duty Valve Springs - Suzuki GS1000 2 valve.

Heavy Duty Valve Springs - Suzuki GS1100/1150.

Heavy Duty Valve Springs - Special Pro Valve Springs Suzuki GS1100/1150 up to .460 lift.

Heavy Duty Valve Springs - Kawasaki KZ650, KZ/GPZ750 fours, Z1, KZ900, KZ1000, KZ/GPZ1100.

Heavy Duty Valve Springs - Kawasaki KZ/GPZ Heavy-duty racing springs, up to .500 lift.

Heavy Duty Valve Springs - Kawasaki KZ/GPZ Racing spring up to .520 lift.

Heavy Duty Valve Springs - Kawasaki Ninja 900/1000

Heavy Duty Valve Springs - Kawasaki ZX10 (thru 1989), ZX11.

Heavy Duty Valve Springs - Kawasaki ZX10 late model.

Heavy Duty Valve Springs - Kawasaki ZX12.

Heavy Duty Valve Spring Kit - Kawasaki ZX14 (springs, bases and titanium retainers.)

APE Pro Mod Valve Springs