Do not buy from speedline!!! Its a bad nightmare with Arley. He sold me a bum engine with no oil pressure, and his reaction was that I was taking up his time. He wanted me to send back the engine, of course me paying the shipping for the both the replacement and the bummed engine. Lets not leave out the fact that I had to pay a mechanic to do all this work. My 300zx is still dead, but this time I'm saving the money for conceptZperformance. Do not waste any money/time with Arley, save it and go with the proven.