besides the coating on the type-r pistons whats the difference between the two? Since they yeild about the same compression in a gsr motor(pr3:11.345 and p73-00:11.333) wouldnt it be better to get the pr3 since you can get a set for alot less? Im choosing between the two because i can get a set pr3, brand new, for $210 compared to $275 for p73-00. i just want to no whats the difference between the two besides compression. thanks

 

weight.

 

whats the weight difference?

 

PR3's are 6 grams lighter.