iv got a 05 660raptor and i want an aftermarket exhaust for it i was thinking hmf or a fmf titanium what do u think will be the best slip on exhaust for my raptor.

 

no point in putting on just the slip on. If you want to gain any real power you need the head pipe as well, do that and you could gain over 10 hp depending on which pipe you buy. If you just want that little extra snap, pull the spark arrestor out and pound out the hole in the baffle, make it bigger, then get the filter and adapter to take off your air box lid, and re-jet. Thats an easy 5-7 hp. Good Luck!!

 

If i get a fmf titanium 4 slip on and get a hi-flow header do i still need a mid pipe.

 

I personally do not like fmf, cheaply made. I would go with a yosh, or if sound is not an issue, a ct sonic. Most bang for your buck. When you buy a pipe the head pipe is the mid pipe, only 2 pieces