Proform cast throttle base plates offer more quality for your carburetor and more savings for your wallet. These cast aluminum units replace your stock plates for better carburetor performance. They feature button Torx head throttle plate screws, timed and full vacuum tubes for accessories and tuning, slip-link mechanical secondary linkage, and power valve blowout protection. Are you looking for an inexpensive replacement? Proform cast throttle base plates offer a boost for your carburetor and your budget.