Holley's billet aluminum Pro Stock throttle body is built for NHRA Pro Stock applications, with a massive 25 square inch oval throttle opening designed to fit Visner Engine Development's (VED) oval mounting flange.
Specifications:
- Product Type: Throttle Body
- Bore Diameter: 7" x 4.5" oval (25 sq. in.)
- Construction: Billet Aluminum
- Finish: Black
- Flange Compatibility: Visner Engine Development (VED) oval mounting flange
- Throttle Lever Mount: 6-position adjustable
- Includes: Non-contact magnetic Hall effect TPS sensor (part number 543-112)
- Fuel System Type: EFI
- Part Number: 112-123
An extra return spring is required for installation, along with a rigid positive throttle stop on the pedal — throttle should never be forced past fully open. A toe loop on the pedal is essential for positive manual throttle return. For boosted applications, a cold pipe pressure relief set at or below 80 PSI is mandatory.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What flange does the 112-123 use?
Visner Engine Development's (VED) oval mounting flange.
Does it come with a TPS sensor?
Yes, a non-contact magnetic Hall effect TPS sensor (part number 543-112) is included.
What installation precautions apply?
An extra return spring and a rigid positive throttle stop on the pedal are required, along with a toe loop for positive manual throttle return. Boosted applications need a cold pipe pressure relief set at or below 80 PSI.
