I have been looking into this this week and the nearest to Losi setup using associated stuff, this is going off Ellises Os setup. Size 2 pistons back and front they are the same hole size as Losi red pistons Blue springs up front and grey(ae) springs to the rear. The ae pistons have less holes than the Losi ones but I dont think that the differance is that noticable. I am going to purchase some Losi pistons for tje AE shock until I can get hold of some Losi ones.