Pro Series 1:1 Secondary LinkageFor All Holley Double Pumper, HP & Ultra XP CarburettorsBrand: HOLLEYPart Number: HO20-122Description: Featuring Stainless Steel construction and a lightweightyet rugged design, it providesa bulletproof method of adjusting secondaries onall Double Pumper, HP, and Ultra XP carburetors. It allows user to pick between 1:1 or progressive secondary ratio. Kit provides infiniteadjustment of secondary throttle blades for maximum horsepower output. Features: Includes all necessary hardware Compact design won?t interfere with throttlelinkage Perfect for circle track and drag racing Detailed instructions included Simple installation Tough Stainless Steel construction for longevity, durability and control Choose betweena 1:1 and a progressive secondary ratio
