Originally Posted by lmr_Bseries
Not saying it isn't the jdm engine but you can't go by that code on gsr I know for a fact a few years usdm gsr's came with b18c... I had one that did... The jdm usually has jdm writing and such on the timing covers, also many companies that sell the jdm swaps will stamp them with co. And usdm/ jdm models...
Its only abt a 6 whp difference anyway stock/stock lol
