05 400 ex exhuasts

[quadrider00]

which has better low to mid power an FMF Titanium 4 with a powerbomb header or an HMF Sport series full system?
What jetting should i run and what other things should i do?

[redhondi400]

HMF is better than FMF all around

[nosliw]

get the full hmf and go with 155mj, 42pj, and clip in second position from bottom on needle. that's a starting place at least

[outofsight]

If you want a pipe for low and midrange then i recommend a full biggun exhaust.