Infiniti Performance Line (also known as IPL) was a line specially developed to offer customers higher performance version of the standard Infiniti models. Still, with 348 horsepower under the hood you can not really say we are talking about a high-performance model.
However, according to recent reports, things are about to change as the next IPL models, starting with the Q50 IPL will be developed in cooperation with Red Bull Racing team. Official from both Infiniti and Red Bull companies have confirmed that this means "genuine engineering collaboration" and not just some simple logo stickers.
We are not very sure if this means the next Q50 IPL will be indeed a serious competitor for models like BMW M3, but still it will be an extremely capable sports sedan.
In order to make an idea on how the next IPL models developed in cooperation with Red Bull team you should take a look at the FX Sebastian Vettel SUV.