All I can say is wow. Stage 4 works awesome. 140tq with a break in tune and under 5000rpm red line. Went for a couple rides on it so far. Just quick rips. Need 1000 km for break in. Then Harley-Davidson of Edmonton has a couple minor bugs to work out on my final Dyno tune on Tuesday then sock the fuel and rpm at it. with s&s cam and thunder max tuner Im said to be final running with close 140 horse and near 150 torque Also full warranty.