ask your dealer , or several around you , my dealer is still gonna cover mine for the extended 5 yr 75,000 bumper to bumper , even after i get my vortech on . I already have BBK full lengths and matching x pipe with converters , usually if you have a good relationship with the dealer and they just arent total A holes then they will work with , just ask them up front before you go changing things , if they say they wont cover you , then look elsewhere is my opinion