DIY Parts and accessories for Classic Mustangs, Jaguar IRS, and Hydraulic clutches
Check out the free tech on my YouTube channel
Adapter Sleeves

Autolite 4100
 Carburetor 1.12 to 1.08 bore adapte

  $37.00  +  $3.00 S&H

Orders that are canceled will be refunded less the 3-6% fee that PayPal no longer returns when a refund is issued.

Back to Parts List Page

This kit is two copper sleeves to size down the bore of a 1.12 Autolite 4100 carburetor for improved throttle response. Each set is hand made and test fit in a 4100 carburetor, they are a tight fit but can be pressed in by hand.  However do to tolerance in manufacturing in the 60s some slight fitting may be required.  I had one customer (the first quote below) that the adapter was loose in one of his two bores (issue with the manufacturing of his carburetor) but the sleeves still functioned flawlessly.


If you want a 1.12 carburetor to function exactly like a 1.08 carburetor you would need to install these sleeves, change the jets to meet your engine specs AND change/modify the boosters.

What these sleeves WILL do without any other modification is improve throttle response and make it easier to install a big block 4100 on to a small block

Two quotes from customers who are running these sleeves:

"Instant difference in throttle response and almost completely eliminated the hesitation off of idle, very impressed.”

"The Venturi reducers have been installed and I am very pleased in how the car is running."

International Shipping Available.  Email me for additional cost information

Other DazeCars parts

New and reproduction parts
    If you need to order replacement reproduction parts for your Mustang make sure you check out Steve's Mustang Parts.

2013 DazeCars
The words / logos for Ford, Jaguar, Mustang, Galaxie, etc are used for descriptive and reference purposes only. DazeCars is neither affiliated with Jaguar Land Rover North America LLC, Ford Motor Company nor the manufacturers/distributors of Ford or Jaguar automobiles.