What warranty its a 1998 Dacota l am talking about.There have always been ways to fool the EFI into giving more power one way is to buy a intake air censor wrap it in heat insulation and and disconnect the harness from the real intake air temp censor this fools the EFI ino thinking it is much cooler outside thus giving the motor more fuel . This will make your car burn 6-7% more fuel leading to more fuel use but the power is very noticeable .Just thinking outside the box and looking at what those chips do. The good things are when you up the fuel ratio your motor funs cooler and the whole thing can be removed in 30 seconds. I E no warranty issues