Upgrade your PROFORM or Holley® carburetors (up to 1 3/4' throttle bores) to achieve higher air flow by reducing the size of the throttle shaft. Each kit includes button head (Torx) throttle plate screws, universal lever, and slip link secondary activation system. The High-Flow kit includes stainless steel button head screws.

Features:
for 4150/4160/4150 HP Carburetors Up to 1 3/4-Inch Bores
  • Torx Button Head Plate Screws, Universal Lever & Slip Link Secondary Activation
  • PROFORM Parts Brand Product
  • Sold as One Kit
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