M42 Stroker info

[smhheidari]

Hi guys, im new here, i searched but and found some infos but i need it more clearly!

Im gonna build a M42 2.1 Stroker for street use, i found that i need an M47 88mm crank and a set of S50B32 piston!
i want to know what kind of stock BMW engine rods can i use and is there any difference between S52B32 and S50B32 pistons for this build!?!

second question, i going to build bmw 2002 race car with M42 1.9 Stroker because im gonna participate in GT2000 race class which the cars should have less than 2000cc displacement, so from this link ive found that i can use stock m42 pistons and M47 crank, now this is the question can i use stock rods or not, if not which bmw rods should i use!

Thanks