Originally Posted by
silverM3
I just want to let everyone know that os speed is by far the best motor i ever used. I know they are expensive, but they actually improve my lap time! I got the Vspec II, and this week i made another personal best lap time. I am sure 12 XZ won't disappoint anyone

i had my try on the engine on saturday for the final tune after the brake in method and the only thing i have to say is ...AWESOME!!!Compared with the 353 tuned had more botttom and the same top end..the difference?it costs about 150$ less!!!!!