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GTP's expert tuners optimize your BMW's performance

A 1/8 NPT port is included for temperature sensor compatibility

Rounding out the Cooling Essentials Bundle is Mishimoto's racing thermostat for the E46 3-series

BMW S58 Pro-Xtreme Valve & Valve Spring Kit 1300736 and 11121722738Simplify your next S58 engine build with this all in one Competition Valve & Spring Kit, now available from 5150 AutoSport. Featuring Ferrea's single groove stainless steel valves and a complete high performance valve spring kit, this package eliminates the guessworkgiving engine builders a reliable, track proven solution in a single click. Built for Power. Engineered for RPM. This kit includes standard size Ferrea Competition Plus intake and exhaust