C'mon guys, you can do better than that. That is a RH door for any six cylinder roadster. Strictly speaking it isn't for an early Longbridge BN4 as the inside upper perimeter door pocket flange is turned 90 degrees (though this would fit and do the job). This door can apply to the BN4, BN6, BN7, and BT7 up to and including the tricarb 3000 roadsters.