Power Stop 11-21 GMC Sierra 3500 HD Front Drilled & Slotted Rotor - Pair E171 Gloss Black 17x7.5 ET35 5.114 - Square Set 4 Wheels Exclusive expansion chamber dissipates annoying

Exclusive expansion chamber dissipates annoying mid-range drone

to provide a new level of accuracy and reliability in 52mm gauges

With a no drill design

which took home the honor of Best New Performance-Racing Product at the 2010 SEMA show

Power Stop 11-21 GMC Sierra 3500 HD Front Drilled & Slotted Rotor - Pair E171 Gloss Black 17x7.5 ET35 5.114 - Square Set 4 Wheels Exclusive expansion chamber dissipates annoyingPower Stop drilled and slotted rotors provide a bolt on upgrade for improved brake cooling and performance. Precision cross drilled for maximum cooling and maximum performance during extreme conditions; rounded slots sweep away gasses, dust, and moisture to keep a clean friction contact patch on the rotor surface. Silver zinc dichromate plating resists rust and corrosion. With a direct OE fit, there are no special modifications needed.