I have a 2018 Mirage 180 Oasis (tandem). I mistakenly ordered the incorrect Turbo fins ($137). So I sent them back and got the correct turbo fins that fit this mirage drive. I am HUGELY disappointed with the fins. They are much smaller than the older version. They are only 2" longer than the original fins and cost more! ($160). At my calculation, that's $40 / inch. I'm also not impressed with the additional speed (or drag) it provides. I know I paid premium for a Hobie Oasis but I feel totally ripped off by the Turbo Fins. Southwind was great in the return and buying the correct fins. Hobie totally let me down on this product.
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.