Proform Billet Aluminum Throttle Base Plate - Holley 650 CFM, 700 CFM, 750 CFM, 800 CFM - 4150 Series Lightweight Carbon Fiberglass Composite Performer applications include heat crossover

Performer applications include heat crossover passage for emissions related engines

57 in Rectangle Port

1 in Long 0

3-1/2 x 3-5/8 in Round Body

This manifold is cast with 3/8" more material in the corners of the ports for a final radius of 3/4"

Proform Billet Aluminum Throttle Base Plate - Holley 650 CFM, 700 CFM, 750 CFM, 800 CFM - 4150 Series Lightweight Carbon Fiberglass Composite Performer applications include heat crossoverUpgrade your carb with PROFORM's new Billet Throttle Base Plate! Made from solid billet construction versus die cast aluminum for added strength and durability this base plate comes with button torx head throttle plate screws, adjustable secondary air flow cam bracket, timed and full vacuum tubes for accessories and tuning, slip link mechanical secondary linkage, and power valve blow out protection! Component for use on Holley 650 CFM through 800 CFM