Thankfully, the IPL team has spent time and money on the powertrain and chassis. For starters, the IPL's 3.7-liter VQ37HR V6 breaths better. The exhaust was opened up considerably – back pressure dropped 30 percent – using bigger dual pipes and a different crossover design. This enabled engineers to recalibrate the engine's ECU, raising the horsepower peak to 7,400 rpm and the redline to 7,500 rpm (an increase of 500 revs). Fuel and spark maps were changed, allowing for a richer high-rpm fuel mix, yet no internal engine changes were required to make the extra power. Compared to the standard G37 Sport, output climbs by 18 ponies to 348 horsepower, while torque gets a six pound-foot bump to net a total of 276