Home > Carburetors & Accessories >

6457 Weber IDF Update Kit - fits 44mm IDF (2 carburetors)

Weber IDF Update Kit

List Price: $170.95
Your Price: $149.95
You save $21.00!

Availability:: Usually Ships in 1 to 2 Weeks
Product Code: 6457

Power up your Weber's with CB's Weber IDF Update Kit. You'll get increased torque, acceleration, and more top end with this all new energy package. The Weber IDF Update Kit features horizontal spray bars that replace standard bulls eye secondary venturi to produce improved atomization through the power band. Longer taper flow main venturi to improve airflow and special calibration are also included. Each Weber IDF Update Kit also includes a complete gasket and O-ring kit. It's not black magic, just another example of CB's creative engineering and dedication to true performance.

Weber IDF Update Kits are available to fit 40 and 44mm Weber IDF Carburetors. Each kit is designed to convert two carburetors to fast track horizontal spray bar discharge. This is a straightforward parts replacement installation. Machining, drilling, or altering of the carburetors is not required. If you can get your tool box open, you can quickly pump up your horsepower with this 'easy to install' kit.

**Will not fit early IDF Webers with cam roller accelerator pump arm without modification**
  • 38 Venturis
  • 1.90 Air Correction Jets
  • 1.65 Main Jets

  • PLEASE NOTE: Substitutions may be made to the next nearest available size, based on availability.

Accessory Parts
6456 Weber IDF Update Kit - fits 40mm IDF (2 carburetors)
Your Price: $149.95

Weber IDF Update Kit

Average Customer Review: Average Customer Review: 4.5 of 5 4.5 of 5 Total Reviews: 3 Write a review.

  0 of 0 people found the following review helpful:
5 of 5 Works well on Porsche 912 November 13, 2023
Reviewer: Craig H from Sioux Falls SD  
Works well on a 1720cc Porsche 912 equipped with IDF carbs. Required some re-jetting but the end result was improved power and drivability.

Was this review helpful to you?

  1 of 1 people found the following review helpful:
4 of 5 44 IDF Upgrade Kit August 3, 2022
Reviewer: Chris Vester from North Bend, OR United States  
great upgrade kit easy to install would recommend nice job CB

Was this review helpful to you?

  3 of 3 people found the following review helpful:
5 of 5 Weber IDF Update Kit June 3, 2021
Reviewer: Harold Bilich from 70503  
I have been using this kit for several years and love it!  The engine is currently a 2 liter, 78mm stroke and 90 mm bore.  Engle W130 cam, port and polished big valve heads, 91/2 compression ratio, early 44 webers (roller accelerator pump) with Update Kit (135 mains not the 165's that is supplied in the kit), and sidewinder exhaust.  The power band is from 4200 to 6800 rpm.   Below that the low is torque is amazing.  The first comment from my friend's that have driven the car is the low end torque.  I firmly believe that the engine combination along with the update kit is the reason for the broad torque curve.  The engine has been on a dyno and produces 130 hp.  Worth the money!

Was this review helpful to you?

Browse for more products in the same category as this item:

Carburetors & Accessories
Carburetors & Accessories > Carb Kits & Accessories
Weber Carburetors
Carburetors & Accessories > Jets, Venturis & Carb Parts