What's the difference between the FS X and the FM XXX

 

There really isn't that much different between the 2 pipes. They are both great. The main difference is the FM XXX pipe has 2" stepped primaries vs the Fullsac non stepped 1.75" primaries. The stepped primaries help increase air flow through to mufflers which helps horse power. I believe they both produce a similar amount of torque. I have the Fullsac on my FM 124 kit and it's great. 141hp/146torque. No complaints from me.

 

Sent a PM.

 

sold thanks