i have a 84 gsl-se. on my old 85 gsl-se a shop in town did a cat back system 2.5 inch with a 2.5 inch dynomax race muffer straight threw design with mandrel bent pipe and it was great. i have another 84 now and wondering if 2 1/4 would be better or 2.5 is fine. also any other mufflers that you would suggest. all help is appreciated

tony

ps= anyone have the racing beat for sale