Our Temp Sender Manifold, a single piece machined from billet aluminum, allows the M50/S50 OBDI dash gauge temperature sender to be used with an OBDII engine. This item is installed in the small coolant supply line that runs from the cylinder head to the throttle body. No more need to drill and tap the cylinder head when performing an OBDI Conversion! Installation is simple. Just cut the hose and insert the Temp Sender Manifold. Secure it with a hose clamp on either side (available above). Install your temperature sender (M14x1.5)and plug it in. That's it. (There's also a provision for the ground connection.) Basic Kit Includes: Manifold (1) Hose Fittings (2) Crush Washer (2) Ground Screw (1) Ground Washer (1) Temp Sender and washer available as an option.