There has been a little bit of debate on how Nissan improved power from 485 hp for the 2010-2011 (480hp 2009) GT-R, to 530 hp for 2012. There is an actual change in the rear section of the exhaust, that was documented by Litchfields in the UK.
A few people have mentioned that the midpipe/y-pipe is also different. Today, I went and took a few pictures, and measured a midpipe/y-pipe that came off a 2009 GT-R, and a 2012 GT-R.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhthIGiyKPPnUrcZoaTIaXWVD-S8hAPP7KMsm9wJ0wsrEp2XmuLEw22wFyadQQ7dimMmEdrB5mOWJqL4qEVKY6mKOBy6aUbdmfWd99XZRPgAHaJC6uXjBGo-3zy4rriIV5SMU1g7m6Jknc/s400/GTR-midpipe.JPG) |
2009 and 2012 midpipe |
Flanges are the same. ID of the piping is the same.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3XFRMaW62rOI-8XNeWlYrvccqRjrtnMxkEsYYAly7r5D_jhZO-PcDOkQJQNh5dTVjzMu1Yop5bu1yov6dsLYN5AFOCZ5JOyz4r41HScAcxBYNXjmKxNkIOmfLxvSzLkTPov31gmWzFuY/s640/GTR-midpipe2.JPG) |
2012 and 2009 midpipe |
The section between the flexpipe and resonator is the same size piping.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsOpWqhjSb6qpYxco5xs1Rgs1HTeCG3Vs1y1aERH3kMyPkkoWrN0tT4ZGQHiRyVmOHcJ7vgksKr7l-_Xo5ct5-WXup4Bsn8ME5vkCz_TkzupBllt6bp4rbdOp3cGOR2hGA4xqTgP24h_E/s640/GTR-midpipe3.JPG) |
Which do you think is which? |
The rear section of the midpipe/y-pipe, behind the resonator, on the 2012 looks a little different, but the ID and OD are the same. The two midpipes are interchangeable.
![](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uV89vZEI7JCpSR0FUMZCi0lhK8uU2EOAwjUoxQJUwVORGDh3U6aMWictxTs8AhNkFLiyWeWgn22r8MUtMm4_EKr47TyHcqjVtUDTeSNRrdGnEvmUk6wWA=s0-d)
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