AKNick
640cc Uber Pimp
I think I'd try to find some exhaust extensions. Otherwise you're going to have one hell of a mess inside the cowl.
Maybe like one of these.
https://www.spotonrc.com/product-page/exhaust-extension-20-2mm-0-79in
Or these. Which ever fits.
https://www.spotonrc.com/product-page/exhaust-extension-15-2mm-0-60in
I was talking with Tim @ NWRC, and he showed me a picture of his, it looked the same, and the exhaust all escaped out just fine to my surprise! His picture showed just a tiny bit of residue around the circumference. SO I may just leave it alone, and maybe build up a little glass/epoxy around that hole so it doesn't have a free path to the inside.