Of course it's been covered - you can't be searching for the right thing.
The answer is yes they have and yes it will put load on the gear box. You might get clutch slip in 4th - and if you've got higher mileage I wouldn't recommend it due to the costs of a new auto box.
Of course if you don't care about that: Then it's a brilliant performance mod and will put a real smile on your face.
At least the 177 is basically bullet proof turbo wise, so no issues there.
Previously: 2003 Peugeot 206 1.6 8v | 2006 E90 320d M-Sport, 19" BBS CH, Full Ice-cold JL audio install, August 2010 Total BMW 6 page feature car. | 2003 Nissan 350Z GT Coupe 286BHP
Now:2010 E92 LCI 335d M-Sport