I have some parts left over from my 1992 Corvette i had supercharged, fuel injectors had only like 8,000 original miles on them, mufflers were replaced at 8,000 miles also with Borla's, Ring and pinion is like a fuel saving 2.73 ratio, i had 3.73's installed, also have computer chip for 92 Chevy 350 that really worked before the Super was installed. You can contact me on cell phone 414-588-5250, Jim Thanks.