What is the best exhaust mod for a Z51 coupe w/ out NPP? Considering the emissions regulations are strict but I think Im safe for 6 years.
Wondering if anyone knows of a dealer or installer that could do this in the Greater Los Angeles area? If it was my old 65 Mustang I could do it but not this car...Borla makes an exhaust that is a bolt on replacement for the NPP, including the 2nd set of valves. You could install that on a non-NPP car, buy the 2 extra solenoids and wire them up with a switch in the cabin to open and close them. That would vice you the "Mild to Wild" effect without having to dip into the car's electronics.