Excessive heat can cause resins in
your brake pad to vaporize or "outgas." As the brake pad wears, the
used friction material turns into a fine dust. This boundary layer
of heat, gas and dust builds up between the pad and rotor surfaces
and inhibits performance. StopTech's slots are machined into the
rotor and help evacuate gasses and dust, shed heat, and keep the
brake pad surface clean. And in wet, raining conditions, the
Vac-U-Slot helps push water off the braking surface for better
stopping power. StopTech uses a special metallurgy and directional
cooling vanes to improve high temperature performance.
The slots also serve as a visual
wear indicator. The slot is machined to the rotor’s minimum
thickness where it crosses the outside edge. If you cannot see the
slot along the outside edge, the rotor has worn down to its discard
depth. StopTech Sport rotors are finished in a durable black e-coat
on the hat, edges and internal vanes to prevent corrosion. The
braking surfaces are left in a bare iron finish to improve brake
From TC Racing of Palmyra, Virginia on 5/17/2013.
we burned up our front pads/rotors in 10hr enduro... not going to happen again! new setup: power slots, brake cooling ducts and PFC 08's.
From Anonymous of Stow, Massachusetts on 3/31/2012.
Installed these myself on my e46 M3 and I love em. Great price, look great and perform awesome!Good stuff...
Positive Track Experience So Far
From Dave Ronyak of Akron, Ohio on 9/17/2009.
I am currently running a pair of front Power Slot rotors on my E36 M3 equipped with Hawk HP Plus pads all around. Stock Brembos warped? after one 2-day school at Mid-Ohio, Zimmerman Cross-Drilled warped? after four 2-day schools, and DBA rotors warped? during third 2-day school. The Power Slot rotors performed faultlessly during a recent school at Nelsons Ledges. No shimmy so far. Road Atlanta and a long road trip are next.
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