Exhaust design Polaris Assault\ 900 Cat engine Project Sled

I'm going to be putting a 900 carb'd Arctic Cat engine in my 2009 Polaris Assault chassis. With the 800 Polaris SLP single, I can lengthen the belly of the expansion chamber 4" with only a couple cuts and welds and that gets me a lot closer to the Cat single for that 900 engine. I can also turn the can and get up to 8' of narrow pipe run out to in to the can. Or I'm looking at a Jaws blanks and a lot more work. I okay leaving a few horsepower on the table and not considering twins, but at the same time still want this thing to run good with the single. Thanks in advance for your suggestions.

Agreed. Going with an SLP single\can for the 900 Cat and going to sell the Poo 800 pipe. No since cutting up the 800 pipe when I can swap them out even money. Thanks.