No, this isn't a wild, hairy beast; the Jekyll to the G37S's Hyde. But overall, the IPL-spec G37 coupe is a subtle, substantial improvement over an everyday two-door G.
Unlike other premium performance lines (M, V, AMG, et cetera), the IPL abstains from stuffing a brute of an engine under the hood. Instead, the G37 IPL retains the same VQ-series 3.7-liter V-6 found in almost every other G. It does, however, raise the output from 330 to 348 hp, thanks in part to true dual exhaust system (one pipe per cylinder bank) that emits a nice burble at idle. A limited-slip rear differential promises to aid traction, although most of the IPL's grip can be attributed to a retuned suspension package and unique 19-inch wheels wrapped in Bridgestone Potenza rubber. Inside, new sport seats with enlarged bolsters offer increased lateral support, while the short-throw shifter is both slick and quick.
Do these modifications completely reinvent the G? Hardly, but they do make a good thing even better. Sure, owners could opt instead to add these parts from the aftermarket, but doing so would cost roughly the same (almost $5000 over a normal G37S), and lack the warranty rolled into Infiniti's package.
Evan McCausland, Associate Web Editor