...Each Pro Series XP Racing Valve Spring is manufactured exclusively from super-clean, chrome-silicone wire milled in Japan...Our superior, Japanese-milled, super-clean chrome silicone wire is 100-percent...
...Crower billet cranks are CNC machined on state-of-the-art mills from round bar, premium 4340 chromoly steel to ensure the strongest possible shaft available. Each Brian Crower crankshaft is nitrided for added longevity and feature large radius...