last night when i exit the freeway my car turned off and its not starting its a b20 block with a b16 head and its turbo it doest start i tryed pussig it to jummp it in 2nd or 3 gear it doesnt start its not the starter or the battry im guessing its my pistons if its is my pistons whats a good piston to buy or should i just buy a stock b20 block.

 

Yea the pistons, get the most expensive ones you can find. Or you could try to troubleshoot it. Getting fuel and spark? Checked the mechanical timming?