What are the ups and downs to both...

I like the Toomey's for top end, but I would get the FMF SST's for duning.

Depends what you want.

Toomy's have more top end and FMF more low to mid.

I have the FMF. I got a better deal.

THEY'RE BOTH TRASH, THE BEST WERE THE TOOMY T-4'S

I got SSTs. Pretty sweet.

The FMF's work well if you don't do all kinds of high speed high rev duning. They have better low end which helps out when you pull a dune in a too tall gear where the toomy's just bog down.

I prefer the toomey's though. There is nothing like the top end pull from a piped banshee. If you want bottom end, the thumper quads are loads better than an FMF equipped banshee.

I'm not really sure, one of our friends that goes to Gordons with us has a
pair of FMF SST's and when we go on a dune ride those things pop all the time, but he can pull up any dune out there. But I'de have to go with the ToomeyT5's.