exhuast question

[youngdawg]

I have a 03 400ex bored to a 440 with a 11 to 1 JE oiston and a stage 1 cam. I was wondering if anyone had any info on which exhuast is better... Big Gun or Yoshimura comp.
I want performance without the harley sould levels
any help would be great...thanks

[Rebelrider4OOex]

ive heard good things about yoshi but never rode a quad with 1

[quadmxracer]

Quit screwin' around and get a sparks x-6. Best pipe you'd ever own.