plz i need help

[440man07]

which pipe would be best for a 440ex with a k-and-n, and a hotcam?

[Scro]

Sparks or HMF

[firefighterjosh]

I have a HMF and it gave me some good torque. I have heard very good things about sparks.

[miller821]

I have a White Bros. and its decent, and tunable. My bro. has a HMF, and its pretty nice to.

[tar]

Sparks