Head pipe

[MightyM991]

I know that head pipes will add horsepower to a fourstroke and I don't want a loud silencer so I was wondering if anyone knows if a 400ex headpipe is bigger and will fit a 250x if so if am going to try to add one to my bike.

[stupid driver]

idk, dont the 250x hav a single head pipe? the 400 has a 2 into 1 pipe

[redrider ex]

400ex pipe won't work but you can buy a cobra head pipe for cheap and its alot bigger