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112-577 Throttle Body

You Save : $74.05 (10%)
List Price : $738.00
Manufacturer #112-577
( Reviews)
Questions, Answers
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Designed for Multi-Port Injection (MPI); Square bore flange; Progressive linkage system; Throttle shafts are offset with respect to the throttle plates so engine vacuum will assist throttle plate closure
High-Flow EFI Series
Quantity Sold:
Sold individually
90-day Holley limited warranty
Anticipated Ship Out Time:
5-6 business days
Flow Rate:
1,000 CFM
Number of Venturi:
Product Fit:
Venturi Diameter:
44.45 mm

Product Information


  • Available as universal-fit or direct, bolt-on replacement
  • Premium aluminum construction for superior durability and lighter weight
  • Built for amplified airflow, horsepower and torque
  • Offered in wide variety of sizes, styles, configurations and flow rates
  • Ideally designed for racing and high-performance engines

Revive your high-performance engine with the premium aluminum construction of Holley’s throttle bodies for amplified airflow, horsepower and torque. With over 100 years of experience, Holley is one of the most recognized names in fuel delivery systems and their carburetors have powered every NASCAR Sprint Cup team for over four decades.

See product for application and installation details.
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 90 days and we’ll take care of it. Check out our Warranty Policy for more details.
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We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.

Question and Answer

Does this bolt on to my stock 7.4 gmc k2500 sierra?Chad S.Jul 11, 2020
Best Answer:Hi Chad, To check fitment please use our Vehicle Selector — which can be found towards the top of the homepage as well as all category, search results, and product pages — can help verify if a part will fit your specific application. To enter your application, simply select your vehicle’s year, make, model, sub-model, and engine type and click “Go.” Once your application is selected, you’ll see a “Guaranteed to Fit” badge if the part will fit, and we recommend that you also double-check Your Vehicle Fit Details as well as the Vehicle Fitment Information table on the product page.
Aldrin P.STAFFJul 11, 2020
What mods do I have to make to the stock intake manifold on my 5.7 RT if I wanted to add this part? Jul 01, 2020
Best Answer:Hello! You would need an aftermarket intake manifold that is designed to have a carburetor, along with a ton of other modifications to the wiring and fuel system.
Mitchell D.STAFFJul 01, 2020
Are the sensors included? Jun 27, 2020
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