I have an 89 gs that The po put a vance and hines slip on. he also rejetted to god knows what. i am looking to get the the best possible mpg which means back to stock jets and maybe a 17 or 18t sprocket. my question is do i have to back to stock exhaust for stock jets and if so anyone know where to get one for cheap and for that matter the stock jets too.
complete exhaust, or the can? ( only)?
I think can only but honestly do not know how to tell the dif3