Complete coolant reroute solution for a more efficient cooling system. Computer-machined from aircraft-grade aluminium alloy and used by hundreds of MX5 owners. – Reroutes the coolant flow back to the original path as designed for Mazda B6/BP engine, which evens out temperature differences that exist between front and rear of the MX-5 engine.– Improved cooling means the engine components are less stressed.– All kits include an additional 1/8″ NPT thread for aftermarket temperature gauge.– Excellent corrosion resistance and will easily outlive any car.– Original sensor locations, working heater system and coolant bypass circuit keep the coolant flowing when cold and allow for a proper warm-up.– Can be installed in a few hours – no need to remove or lift the engine.– Fully reversible if you keep your original parts.