The Allstar Performance Aluminum Throttle Linkage with Return Spring Kit ALL54178 pairs a 36 inch aluminum throttle linkage rod with 1/4 inch rod ends and a complete return spring kit for smooth, reliable throttle operation.
The return spring kit includes correct stepped bushings, mounting hardware, and both a heavy rate and a light rate return spring. It is designed for 2300 2bbl and 4150 4bbl Holley style carburetors. The linkage rod can be shortened and re-threaded using a 1/4-28 tap to fit many applications.
Spec Sheet
Allstar Performance Spec Sheet (PDF)
Compatibility
Designed for 2300 2bbl and 4150 4bbl Holley style carburetors.
FAQ
What does the ALL54178 kit include?
It includes a 36 inch aluminum throttle linkage rod with 1/4 inch rod ends, stepped bushings, mounting hardware, and heavy and light rate return springs.
What carburetors is this kit designed for?
2300 2bbl and 4150 4bbl Holley style carburetors.
Why does the kit include two different return springs?
The kit includes both a heavy and a light rate spring so the tension can be matched to the specific carburetor and linkage setup.
Can the linkage rod be resized?
Yes, it can be shortened and re-threaded using a 1/4-28 tap.
What material is the linkage rod made from?
Aluminum with a black anodized finish.

