It's nice, but I think there's a lot of potential missing.
I really like how the 13B can spit fire, but I think the engine should have more compatibility.
I think it should be added to the Bastion and SBR4 if possible.
I also think what's really holding the engine back is that it doesn't work with vanilla exhaust. I was excited to see if I could use it on the D-Series with bed stacks so I can see the stacks shoot fire but I was disappointed when I found out it can't. It'd be complex I guess but I really think adapting vanilla exhaust and mufflers for the 13B would make it a lot better.
I think the 572 engine should be added to more vehicles like the Bastion, D-Series, Scintilla, 200BX, and ETK-K Series. The 572 is cool but its limited compatibility really holds it back.
Yes this would definitely be a lot of work if everything I said would be created for a future update, but it would make this mod so much better.
I like seeing 2Fast create good quality mods now, so do your best to make this stuff really good.