This rear suspension crossmember is designed for use on lowered trucks and eliminates driveshaft clearance issues & maintains proper pinion angle. The dual exhaust cutouts allow the exhaust system to go through the crossmember instead of under the frame for extra ground clearance (fits up to 3.00" dual exhaust). This crossmember replaces the factory part in the stock location, and works with the factory trailing arms, along with all Hooker Blackheart swap components on the 1963-1972 C10 truck. The heavy-duty 1/4" steel construction with black powder coated finish is durable & looks great.