I have not used my set up as of yet still putting the car together.. but I will say this I email killerrons and got a lot of help from them guys and have not even spent 1 penny with them.. I got all the part #'s for the set up (used) and sent to them 1 night and got a email back the same night with a # to call if I need any more help...so I must agree with jim and say call them they are in my book...