Ever start an engine without headers ??

[lineslinger]

I saw two guys fire one up in a gravel driveway sitting on the oil pan at night, just like going to the circus and the 4th of July on the same night.

[cobraviper_99]

I recently had my headers and side exhausts off to have the coating reapplied. I started the engine and the flames coming out of the engine were pretty intense. I shut it off immediately. Running it much longer probably would have damaged the paint on the lower fenders.