OK guys. Stainless system goes from exhaust "end" all the way up to engine. Looks like has "round"muffler about half way back. Looked on line at suggestions and seems like Walker is 3 1/2 inch inlet/out which would require mod for pipes. Guess I can't search Peninsular sites correctly cause I keep getting engines and parts. Guess I will carry to muffler shop next week after we get through this snow/ice business in GA. (To those in AL, GA, SC, NC, hope all will keep power). Great info and I appreciate the help!! At least I will have some data to discuss with them! Thanks much.