SKU: AFC20038B
MPN: 20038B
The Adapter Bushing from AFCO RACING PRODUCTS (MPN 20038B) is a lower control arm bushing adapter built to convert a 2.000 in/ft taper down to a 1.500 in/ft taper, the standard step from a 36-degree to a 38-degree mount. It's a piece racers and chassis builders reach for when a lower ball joint stud taper doesn't match the control arm bore. Machined from steel and sold each, this small adapter solves a fitment problem that otherwise stalls an entire front-end build. It works for circle track, stock car, and street-rod suspension setups.
Per manufacturer specifications, the bushing carries a 0.660 in inside diameter and a 0.715 in outside diameter, with a 0.990 in thickness and an overall length of 2.000 in. The taper range runs from a 1.500 in/ft minimum to a 2.000 in/ft maximum, which is what allows it to bridge two common stud and bore configurations. The body is steel with a natural finish, so there's no coating to wear through under repeated press fits. Outside dimensions measure 3.4 x 2 x 0.85 inches. Because it's a steel adapter rather than a rubber or polyurethane piece, it transfers load directly between the stud and the control arm without flex, holding alignment geometry where you set it.
Reach for this adapter when a replacement lower ball joint comes with a taper that's a step off from your control arm. Rather than reaming the arm or sourcing a different joint, the bushing lets the existing taper seat correctly. It's a common fix during front suspension rebuilds and chassis swaps where mixed-vintage parts end up on the same car. Pair it with the matching stud and joint from our ball joint kits or browse the full range of steering and suspension components to finish the front end.
It converts a 2.000 in/ft taper down to a 1.500 in/ft taper, which corresponds to the step between a 36-degree and a 38-degree mount. That lets a ball joint stud with one taper seat correctly in a lower control arm bored for the other.
It is machined from steel with a natural, uncoated finish. Steel construction transfers load directly between the stud and the control arm without the flex you'd get from rubber or polyurethane, so alignment geometry stays put under repeated use.
It is sold each. Most front suspension setups use two lower ball joints, so order quantity according to how many tapers you need to convert on your build.
Per manufacturer specifications, the inside diameter is 0.660 in, the outside diameter is 0.715 in, and the thickness is 0.990 in. Overall length runs 2.000 in. Confirm these match your control arm bore and stud before pressing it in.
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