No, that's when the fuel mixture ignites and fires back out the intake. That's not something you want. Afterfire is when the fuel ignites after the combustion chamber, and is something you do want Common mistake I made a thread explaining it before, I'll see if I can find it. Edit: Here's the post: https://beamng.com/threads/afterfire-vs-backfire.49197/#post-739953
I like the fact that, with some creativity you can build some good sleepers.. E.g my 2400ix badged, 600hp I-series
Would it be back fire without the exhaust because of improper back pressure? The gear shifter moves on some vehicles