Just a quick question, i am planning to build a lsvtec using b18a block with ctr head. Which piston would fit best without any machine work using stock ls crank/rod. The car would be use mainly as a daily and some auto x event.

 

you'd have to use a ls or b16(a) style piston for a direct fit.

 

you could just call up wesco pistons and tell them what you have and need and looking for and take some measurements and they can help you out probably more than any of us on here and it depends if you want dished pistons too but that is for you to decide

 

will rs machine pr3 piston direct fit to stock ls rods without any modification?