What do you reckon?

[Doctor T]

What do you reckon Photoshop or not? I would never leave a boxer or any engine to heat up this much without airflow. Also, you can hear a knock noise from the engine

[Capt Sisko]

Header pipes, manifolds and more can get red hot during repeated dyno testing on performance engines. In practice for us mere mortals on mainstream productions cars & bikes the engine has to have been running for a darn sight longer than just a few minutes, and at a decent revs, and probably needs something else such as after-market headers made from cheap & thin material to get to that point, so in theory possibly not photo-shopped, but like you my mechanical sympathy would have stopped me well before it got even close to that point.

[Doctor T]

Apparently, the headers turn red just after a few minutes of choke. Don't think so

[burridge01]

Apparently, the headers turn red just after a few minutes of choke. Don't think so

Never had headers turn red like that, and that includes me single pipe 2 strokes.Maybe they got special juice in them parts.