Rancher 400 exhaust

i dont really know of any certin brand of exhaust that will let you idle underwater. i know that a person i ride withs HMF on his grizzly will idle under water. my tractor muffler would not idle under water. i think it all depends on how much back pressure the exhaust gives you. you could get a exhaust snorkel too, i have pics of mine in my sig below.
-Aaron

Why not just turn the idle up??

just turn the idle up bout 2 to 3 turns it will idle under water. i had my old 350 ranche idlein bout 4mph under water.

I know to turn the idle up but i need the few extra hp that an exhaust gives to turn bigger tires, because the 400 transmission sucks.

I know to turn the idle up but i need the few extra hp that an exhaust gives to turn bigger tires, because the 400 transmission sucks.