Hayabusa Heavy-Duty Valve Springs 65 lbs seat pressure

Hayabusa Heavy-Duty Valve Springs - 47 lbs seat pressure

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 .560 lift.

Heavy Duty Valve Springs - Kawasaki Ninja 900/1000

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

Heavy Duty Valve Springs - Kawasaki ZX12.

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

APE Pro Mod Valve Springs

Valve Springs - GSXR1000 2001-2008

CBR1000RR Valve Spring Kit (Springs, Retainers, Bases) 2008-2016

Heavy Duty Valve Springs - Watercraft STX-15F, Ultra250, 260, 300, 310 and SX-R