Hotchkis Sport Suspension 4010 1966 - 1970 Mopar B - Body Subframe Connectors. The Hotchkis Performance sub - frame connectors for 66 - 70 B - Body cars are designed to add rigidity to the chassis to improve vehicle performance by reducing chassis flex. Fabricated from 1.5 in. x 2.5 in. .120 wall rectangular steel these MIG welded connectors are powder coated gloss black. Installation of these connectors does not require modifications or cutting of the floor boards. This is a must have finishing touch for any B - Body restoration. Features Powder Coated Gloss Black Finish MIG Welded Fabricated from 1.5 in. x 2.5 in. .120 wall rectangular steel. Rigidly connects the front sub frame to rear chassis frame rail which dramatically reduces chassis flex during hard cornering and acceleration. Does not require cutting or modifying the floor and Tucked - in design gives excellent ground clearance. Benefits Rigidly connects the front sub frame to rear chassis frame rail dramatically reduces chassis flex during hard cornering and acceleration. Improves vehicle handling and traction.