I recently just bought the Race Chip for my G87 and got a 60-130 time to compare to stock. Bone stock hardware no intake or exhaust. Stock time was 10.6 with 1800 DA, while Race Chip map 7 was an 8.9 with 1000 DA. 1/4 mile time also improved from a 12.20 @117 in 1800 DA, to 11.97 @122 in 2400 DA. The car drives very smooth and the chassis handles the power as if it were stock!
Stock 1/4 Mile
RaceChip 1/4 Mile
Stock 60-130
RaceChip 60-130