The gang down at Modbargains recently did an install on a BMW F80 M3 with Injen's SP1116 cold air intake.
"This is Good for an increase of 19 more horsepower and a whalloping 23lb/ft more torque at the rear wheels, the Injen Intake for BMW F82 M4 & F80 M3 offers a much more satisfying engine note and faster acceleration to match the roar of the exhaust."
You can read the entire blog post here.
