RacerX setback arm kit
 

do i need to all ready have a RacerX kit to use this?
and will 2 sets fin my truck

You have to already have the RacerX, and I think it comes with two, but I'm not sure. Guess I'll go check...

Edit: Yup, come in a pair, but no matter what, you need the RacerX suspension.

Yes, correct.

They come in pairs.

And you need the UE racer-X susp. They are very nice. they come, unlike the racer-X suspension, unpollished. so you need a little of elbow grease to get them as shiny.. (IF that's the intention..)

You accually don't need the suspension. You will need a set of knuckles
and upper arms for the suspension.