• High-Flow Main Body!
• Dyno-Proven Horsepower & Torque Gain!
• Adjustable, Screw-In Air Bleeds!
• High-Performance Down-Leg Boosters! (except 650 CFM)
• Maximum Air Flow.  No Air Horn, Choke Tower, or Choke Control!
• High-Rate Air-Flow Section Design!

PROFORM Billet Throttle Base Plates

• Adjustable Secondary Air Flow Cam Bracket!
• Solid Billet Construction!
• Hand-assembled in the U.S.!
• Timed & Full Vacuum Tubes for Accessories & Tuning!
• Welded Throttle Shaft!
• Button Torx Head Throttle Plate Screws!
• Power Valve Blow Out Protection!
• Slip Link Mechanical Secondary Linkage!

PROFORM Billet Metering Blocks

• Solid Billet Construction!
• Durable, No Warping or Porosity Problems!
• Changeable Idle Feed Restriction!