howell1000 35 #1 Posted May 19, 2017 I have a SK 486 with a kohler k341 16hp I am wanting to replace the old exhaust with a tractor stack exhaust what type of pipe can I run from engine to new exhaust ?? thanks Share this post Link to post Share on other sites
Racinbob 11,947 #2 Posted May 19, 2017 Check your engine. I believe you have a 1 1/4" npt exhaust port and it is reduced to 1" npt so you could use 1 1/4" or reduce it like they did. I doubt they did that for the added back pressure but rather so they could use the same muffler as the lower hp motors. 6 Share this post Link to post Share on other sites
