Triumph Unit 500 Lightweight "Racing" valve spring kit With Keepers:YES (add $33.30) 0005" smaller than the intakes

0005" smaller than the intakes

only using ChroMoly tubing

two 5/16" primary stud copper washers

and will work with stock Triumph 500

both 650 and 750 models with an oil feed to the tappet block

Triumph Unit 500 Lightweight "Racing" valve spring kit With Keepers:YES (add $33.30) 0005" smaller than the intakesThis is the best spring kit in the world for the Unit 500 head, early or late. No matter what camshafts you are running, stock, hot rod, or wild racing cams, this spring kit will work for you. These high quality springs are wound with super clean chrome silicon wire that is then heat treated and shot peened. The ultra light titanium retainers reduce reciprocating weight and the base washers are specifically engineered for this kit. Included are 4