I have the stock dual 2 into 1 crossover exhaust on my 2000 Ultra Classic. The right side is 2 into 1 and the left side runs off a dual spilt on the rear cylinder. I noticed the left pipe does not emmit any exhaust nor does it get hot?? Is this the way the stock 2 into 1 crossover system works?? If someone could explain it to me I would apprecitate it as I not a mechanic. Thank You!