Lang Tool TU-32-27 Diesel Fuel Test Adapter Description ; – For testing Ford Power Stroke 6.0L engines, 2003 to present. – Quick coupler adapter consists of M12-1.50 male fitting on one end of a 6-in. hose with 1/4-in. NPTF on the other. Click Here. Double your traffic. Get Vendio Gallery – Now FREE!