COMP Cams Dual Spring Set 1.550 OD 1.900 IN .740 LiftCOMP Cams' new 26943 dual valve springs are a product of innovative design and superior craftsmanship. Engineered with state of the art techniques and premium wire processing, including superfinishing, they redefine reliability and consistency in the performance automotive aftermarket. The 26943 is geared towards race oriented solid roller applications, with up to . 740 lift at an installed height of 1. 900. They fit cylinder heads with at least a 1.