hey john, its todd here yeah id reccomend upgrading to a turbo head, that way you can run nova turbo plugs in your engine, as far as i have found they seem to be the most reliable out of all the glow plugs on the market. ive run the same glow plug for about 3 ltrs of fuel ( put 2 ltrs thru the engine last weekend at the sydney grand prix ) and its still running strong