StopTech 126.62105SL Sport Slotted Brake Rotor (Rear Left) Review
Slotted brake rotors clear pad gas during heavy braking. StopTech's 126.62105SL is the right rotor upgrade for spirited-driver and HPDE applications.
TL;DR
StopTech's 126.62105SL Sport Slotted Brake Rotor (rear left) is the right rotor upgrade for spirited drivers and HPDE participants who care about brake performance under repeated heavy braking. Slotted design clears pad gases that build up during aggressive use, preventing the brake fade that blank rotors suffer. Premium American brand reputation, OEM-grade fitment, and slotted design at the price point. At its premium pricing, it's competing with EBC and DBA — and StopTech's pedal-feel reputation is the differentiator.
Why It Matters
During heavy braking, brake pads heat up enough to release gases. With blank-face rotors, these gases get trapped between pad and rotor, slightly reducing friction ("brake fade"). Slotted rotors include grooves that clear these gases — preserving consistent pedal feel through repeated heavy braking. For spirited driving, mountain roads, and track days, slotted rotors are meaningfully better than blank rotors.
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Key Specs
- Part number: 126.62105SL (rear left)
- Type: slotted face (gas-clearing slots)
- Application: vehicle-specific (verify your vehicle's part number)
- Material: high-carbon iron
- Compatibility: most stock brake calipers (verify pad part number)
- Warranty: StopTech standard limited warranty
- Side: rear left (left-side specific; rear right is sold separately)
Pros
- Slotted design clears pad gases during heavy braking
- StopTech's American manufacturing reputation
- High-carbon iron resists warping
- Compatible with most stock brake hardware
- Right upgrade for HPDE and spirited driving
- Matches OEM rotor dimensions for direct replacement
Cons
- Premium pricing vs. blank replacement rotors
- Side-specific — must order matching rear right separately
- Slotted face wears pads slightly faster than blank rotors
- Doesn't replace stock pads (use Hawk HPS or similar for full upgrade)
- Some buyers report initial brake squeal that fades with bedding
Who It's For
Spirited drivers and HPDE participants. Anyone whose stock brakes have shown fade. Track-day cars in upgrade phase. Skip it if you only daily-drive (stock rotors are fine), if you race competitively (consider drilled or larger rotors), or if you want a different brake-pad/rotor system entirely.
How to Use It
Verify part number 126.62105SL matches your specific vehicle. Replace one wheel at a time. Bed in new rotor with 8-10 progressive deceleration cycles from 60mph to 20mph. Avoid panic stops during break-in. Pair with quality brake pads (Hawk HPS, EBC, etc.) for matching performance. Replace the matching rear right rotor for symmetric setup.
How It Compares
Vs. EBC USR Series slotted rotors: EBC is comparable mid-tier. Vs. DBA T2 slotted rotors: DBA is comparable Australian brand. Vs. Power Stop drilled and slotted: Power Stop is mid-tier. Vs. cheap unbranded slotted rotors: cheap unbranded may have casting flaws and inconsistent slot patterns.
Bottom Line
The right brand-name slotted rotor for spirited drivers. Buy the rear left + matching rear right. Skip it for stock daily-driver use or budget-tier replacements.
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