Testing was done while monitoring oil, water, and inlet air temperatures to record gains as accurately as possible
Given that most cars benefit around 4 percent with an intake system in terms of peak power, we expected to see a larger gain up top, netting around 307 whp in the end, which, at 5700 rpm, the curve looked to be heading toward.
While the power increments there seemed to slow down suddenly, it's hard to believe that this was caused by running a freer-flowing intake system. Given the shape of the curve in that region, however, we can assume it's from a slight reduction in ignition timing from the DME on these last pulls. We've seen DMEs do this before (and a 1-2 degree retard will be evident on the curve), but without the ability to monitor ignition values that day we can only speculate. Still, in the low-end and midranges were some nice, steady improvements averaging around 5 lb-ft of torque. The dyno also confirmed a 0.1-second improvement in acceleration from 3500-7000 rpm in Third gear
What makes this upgrade even more worthwhile is the new engine song at high rpm that will have you dancing in your seat. Driving it around at part throttle and the car's cruising decibels are as docile as a 997s should be. Rev it past 5000 rpm and it roars in a matter that will make you want to leave your window rolled up for fear of getting sucked into the air duct. Henceforth, we can't determine if the intake system has helped our fuel mileage because we're always flooring on it. Special thanks to Tuning Technologies for its assistance and dyno use.