Comparison : Item # HCUM-0110, 4BT/4BTA 3.9; Manifold
Item # HCUM-0111, 4BT/4BTA 3.9; Turbo
Item # HCUM-0112, 4BT/4BTA 3.9; Outlet Elbow
Item # HCUM-0115, 4BT/4BTA 3.9; Manifold
Item # HCUM-0118Z, 4BT/4BTA 3.9; Complete Set