CUrtis Sparks X-4/FMF Power Core 4/White Bros. E- slip on????

[speedracer350X]

I narrowed it down to those 3, which, well, not really which one is best, I think the Sparks is, but I like my buddies White Bros. on his EX, and the sound is acceptable. I kinda like the looks of the FMF, seems kinda like a White Bros. copy. I don't plan on heavily modding my EX, just basic pipe and air filter. Any opinions would help. Noise is kinda an issue, if the Sparks is way loud like my Cobra Jet was on my 350X, I'll definitely stay away from it. Like I said, my friends White Bros pipe is an acceptable level and I think sounds great too.

[sweet300ex]

dont get the FMF, go with the Sparks or Whitey

[dirtysouth400ex]

i have the fmf ti-4 osunds kool to me decent power gains dowm low

[4wheelboy]

i like hmf alot:o

built strong and sounds nice 2

[westcoastmxer]

ALL OF THEM ARE GOOD BUT U NEED TO THINK ABOUT THE PRO-CIRCIUT T4!(VERY NICE)