I have a 2012 Outback and boy do these make a difference. If you have the sail kit, this also helps keep your boat from slipping sideways as well. Easy to install. Took me about 15 min. A good performance increase over the stock fins. Measured 3-4 mph with the stock fins, 5-6 mph with these fins on the Outback.
The turbo fins are a bit larger than the regular ones. They make a big difference on the water and I'm able to go a lot faster. It's a pretty cool upgrade if you ask me.
These fins work really well. I just took my Hobie Outfitter tandem down to the sea of Cortez for a couple week of fishing and cruising around. I pedaled at least 9 miles everyday and I found that these fins really increase the speed of the kayak. The fins are a bit longer so you have to be careful about how much water you have underneath your kayak. The rods are pretty durable and I haven't bent one yet, but you should be careful anyways. If you go in shallow water a lot then I recommend using the shorter strokes so you don't beach yourself. Southwinds was very helpful, I didn't understand the installation, and they gave me some useful tips. The fins are pretty easy to install, there is a Hobie video out there somewhere that explains everything. I also suggest adding the large rudder as it really helps with turning when you are cruising along with these fins.
Must have for all Hobie pedal kayaks. I can pedal up to 7 knots using these fins. Makes the kayak much smoother.