gx390 open header....bad...good?

[steezy]

my gx390 wont fit on my dingo with the stock muffler so i took it off and now its the header and nothing else. what should i do, put a pipe on there or leave it as it, i dont care about sound just dont wanna mess up engine

 

[Russ2251]

Engine will not be hurt.
Block will not crack and valves will not burn or become otherwise damaged.
I've done it for many seasons (summer) without as much as a hiccup.

 

[kazkepox]

just as long as there is some sort of pipe directing the exhaust gasses away from the engine, if theres nothing there at all, it can't be good.

 

[Russ2251]

just as long as there is some sort of pipe directing the exhaust gasses away from the engine, if theres nothing there at all, it can't be good.

Reason?

 

[brendonv]

Its not bad its just people usually want to direct the exhaust gases elsewhere or want to make it look cool. Its only a small engine, they can take a bit of abuse and things can be done a tad on the dodgy side.

 

[slideways]

Buy or make a header that is around 12" long overall. If you are just referring to that stock manifold/J bend they have on them you may be ok but i wouldn't run that. You are sacrificing power and eventually life of the motor with that.