[jasonh660]

I just installed my new Yoshimura RS-3 Comp full exhaust, took it out for about an hour and the headers are blueing right where they go into the motor. Does this mean it's running too lean like on a harley or is it normal?

 

[Flynbyu]

Mine did the same thing.

Check the plug color just to make sure.

~Brian

 

[ur_cableguy]

I've never seen a stainless header pipe not change colors....it'll be blueish purple fading into bronze

 

[MPTonyT]

yohsimura states that a bluing header is a sign of running lean. the only way to tell is to check the plug.

 

[raparapaman]

my plug looks like it was dipped in chocolate milk and my header still turned a pretty blueish color, doesn't matter to me I didn't buy the raptor as a show piece.