Feuling Econo Valve Spring kits CUSTOM TRIM AND ACCESSORIES_JOKER MACHINE The adjustable Pressure Relief Valve

The adjustable Pressure Relief Valve is adjustable with the unit installed in the engine

pin and clip

the STX36 line of suspension is one of the most successful designs of all time at an affordable price

Genuine proprietary materials provide excellent comfort and durability

Feuling Econo Valve Spring kits CUSTOM TRIM AND ACCESSORIES_JOKER MACHINE The adjustable Pressure Relief ValveFEULING ECONO performance BEEHIVE valve springs designed to handle up to 585 lift camshafts at an economical price. These FEULING BEEHIVE springs are made from the same premium stress relieved conical ovate wire as our HIGH LOAD springs but are developed for economical engine budgets. They have an excellent level of fatigue life and are designed to handle the demands of performance engines with 585 and smaller lift camshafts. Dyno proven and track