Oil piston combo big bore carpit tracks
 

As title also spring car is a cat sx3
fast gripy corners and some jumps where car will land on flat from about 3f up

3 hole pistons 1.6mm front 1.7mm rear ( they come 1.55mm holes)
32.5 front 27.5 rear ae oil
4.0 front 2.5 rear shocks mounted on front at rear.
or losi bb blue front, pink rear

So do I have to drill the pistons out ? To get 1.6 and 1.7 ?