[AMS Performance]

No long tube headers are "bolt-on" they all require welding and custom modification so keep that in mind. If you do not have primaries you will get a CEL light, but since you say you have software then it might be ok. However, at stop lights your car will smell bad and the fumes will be pretty toxic. Furthermore, from an ethical environmental standpoint, its not good to remove all your cats. If you already have secondaries deleted then a good set of shorties would give you nearly the same results. If you delete all your cats you may actually hurt parts of your torque band due to loss of back pressure so keep that in mind as well.