OS 65AX & exhaust length
I have an 65AX that I have installed in a Hangar 9 Denight Special. For an exhaust I have a Bisson Pitts muffler. My question is does exhaust tube length greatly affect engine perfomance? I want to cut the exhaust tubes shorter and then add on custom length tubes that would be approximately 6 inches longer and swept back and down thru the rear of the cowl. Will this affect my warranty on a new engine and will itbe a detriment toperfomance?