UMI Performance Boxed Lower Trailing Arm - GM B-Body 1978-96 3621-B 346-OR 540 in D Port

540 in D Port

1 Timed Port/1 PCV Port/1 Vacuum

GM Duramax 2001-15

1991-1993 GMC Sonoma CID 305 GAS RWD

Patented Laminar Flow Technology

UMI Performance Boxed Lower Trailing Arm - GM B-Body 1978-96 3621-B 346-OR 540 in D PortUMI Performance Boxed Lower Trailing Arm GM B Body 1978 96 UMI's extended length trailing arms optimize wheelbase to improve the appearance of the wheel in the wheel opening. Heavy boxed tubing and high quality polyurethane greaseable bushings make our extended length trailing arms a great upgrade to your ride. We recommend using extended length upper arms such as UMI 3619, 3620 or 3624. **Features** Built using 0. 120 Wall Thickness Rectangular Mild