The initial pull made 10hp on the stock ECU with a good jump in output down low between 4000-5000 RPM and another nice jump after 6500 when the car really wakes up. The 2nd pull saw 298hp (not shown) or 13 more hp from the 285 baseline. Our car really liked adding lots of timing on the stock ECU which is why we saw 13hp on the 2nd run but subsequent runs seemed to hover around 10hp.
The G37s is no slouch in the braking department with very decent hardware sourced from Akebono. The system features 4 piston calipers up front and 2 piston calipers rear. Without knowing the prior service history of the car I assume the rotors have never been changed and saw this an opportunity to improve the braking and freshen up the entire braking system. We installed Stillen’s slotted brake rotors and high performance street pads. At MotoIQ we prefer slotted rotors over drilled due to the possibility of hairline cracks in drilled rotors that usually happen during extreme use. The other benefit of slotted rotors is that they wipe the brake pad surface to reduce pad glazing. For the pads themselves we topped the system off with Stillen’s own in house Metal Matrix proprietary blend. Stillen’s goal is to offer a pad that operates at a higher heat range than stock with quiet operation and low dust.
Stillen’s slotted brake rotors with the front’s (pictured bottom) and the rear brake rotors (pictured top).
I thought the new pins and retaining clips were an especially nice addition to the brake pad kit.
It’s really hard to tell how beefy the brakes for this car are behind the multispoke wheels but the rotors are really massive.
Our only real complaint about the stock brakes was that the initial bite was a bit sudden. Anyone who’s driven the car often apologies for unintentional seatbelt lock for the first few tries as they get used to applying the brakes. Looking at the new Stillen rotors outside of the car I had no idea how massive the brake upgrade on the G37s was. The only time I remember lifting rotors this heavy was when I moved the big box of brake rotors for Project Tundra. Like a full race brake setup two pins secure the pads for quick changes at the track.
