The 2012 IPL G Coupe represents many things to Infiniti. For starters, the Infiniti Performance Line (IPL) is the automaker's first dabble into the kind of performance premium sub-branding that makes German luxury cars bearing an "//M" or "AMG" badge so alluring. If the automaker deems the IPL G a success, then perhaps we'll see the sub-brand expand. Could an IPL M Sedan be on the horizon? Let's first figure out if the IPL G Coupe in the CNET garage is worth the extra dough.

Stepping up to the IPL G Coupe really only improves the G37 Sport in two measurable ways: it goes faster and it handles more sharply. The other changes, including a more raucous exhaust system and bright red leather sport seats, are more subjective improvements, but welcome additions nonetheless.

• It goes faster.
• It handles better.