UMI Performance 65-66 GM B-Body Adjustable Upper Control/Trailing Arm

SKU: UMI3657-B

UMI Upper Control Arms...

UMI Performance 65-66 GM B-Body Adjustable Upper Control/Trailing Arm

SKU: UMI3657-B

UMI Upper Control Arms...

Last Available from MFR. LAST ONE AVAILABLE from the manufacturer's distribution centre. Once sold, this item may not be immediately available again. The dispatch timeframe shown is an estimate based on historical orders for this part and is dependent on the manufacturer releasing the final available unit.

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Description

UMI Performance offers one of the only on-car adjustable control arms for the rear of the GM B-Body vehicle. This rear upper control arm for the 65-66 GM B-Body is an excellent solution when looking to replace the worn out factory set-up. Our rear upper control arms are a direct replacement for the factory arms and are designed to minimize wheel hop, improve cornering and help track consistency. This control arm is on-car adjustable and allows easy pinion angle adjustments. Adjustments are made while the control arm stays attached to the vehicle. Competitor designs require you to remove the control arm from the vehicle to adjust. Adjustment can also be used to eliminate the use of shims during installation. Adjusting the control arm is as easy as loosening two jam nuts and turning 4140 Heat Treated Chrome-Moly Adjuster that utilizes left and right hand threads.

Data: v4.2 - Upd: 2026-10-14 07:34:58

Features

4140 CrMo Tube Adapters
Durable Powder Coat Finish
Grease-able Polyurethane Bushings
On-Car Adjustability using a 4140 Heat Treated Adjuster
TIG Welded Construction

Specifications

Reference Information

Brand Name/s	Umi Performance
StreetFX SKU	umi3657-B
SFX Item ID	4155737
Supplier Item Code	4155737
Manufacturer SKU	3657-B
Manufacturer UPC	N/A
Alternative References	upi-3657-b