SKU: 38535963030

Stoptech Rear Gas-Slotted Rotors - E46 M3 | E39 M5 (328x20mm)

Sale price$204.16 Regular price$226.85
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Description

Stoptech Rear Gas-Slotted Rotors - E46 M3 | E39 M5 (328x20mm)Power Slot Rotors Power Slot rotors are 1 piece, slotted, direct replacement discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. Launched in 1998, Power Slot was the first premium slotted replacement rotor program in North America. Innovations include e coating, double disc grinding, full machining, mill balancing and center split castings, as well as the



Power Slot Rotors

Power Slot rotors are 1-piece, slotted, direct replacement discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. Launched in 1998, Power Slot was the first premium slotted replacement rotor program in North America. Innovations include e-coating, double-disc grinding, full machining, mill balancing and center-split castings, as well as the availability of directional vanes, cryogenic treatment and the use of Power Alloy. Today, Power Slot covers more than 2500 applications, all machined in Power Slot's California manufacturing center. Every Power Slot rotor is a direct replacement for a factory brake rotor, allowing the retention of factory calipers in the system.

Most Power Slot rotors match the original factory cooling vane design. In the most popular sports car and light truck applications, Power Slot has improved the design by using directional (left- and right-handed) vanes to improve cooling. This represents a distinct upgrade from the original equipment rotors, which usually feature a straight vane or pillar vane design. The directional vane is a more efficient air pump. The resulting increase in airflow translates into greater resistance to brake fade and faster recovery from temperature spikes generated by aggressive braking maneuvers.

Power Slot rotors feature a signature "short slot" design. The slot improves brake system performance by wiping away the debris of used friction material that otherwise accumulates between the rotor and pad. This keeps fresh pad material exposed to the rotor surface and helps prevent pad glazing. The edges sweeping the pad slightly increase the effective coefficient of friction, or "bite", amplifying brake system response to pedal input. By providing an escape path for water, slotted rotors can also improve initial brake response under wet conditions.

Every Power Slot rotor is finished with a black e-coating on both sides of the hat, inside the cooling vanes and on the outside edge. E-coating is a superior electro-statically applied finish designed to withstand 400 hours of salt water exposure without rusting. This is especially important on both mounting faces of the hat where it touches the hub flange and back face of the wheel. Any accumulation of rust in these areas can lead to installed lateral runout issues.

Power Slot rotors feature a double disc ground, taper free finish. Double disc grinding ensures parallelism, eliminates run out and provides near perfect disc thickness variation (DTV). Double disc grinding leaves a non-directional finish on the friction surface area for more effective pad and rotor break-in. This special finish also provides quieter and smoother stops.

Power Slot rotors feature 100 percent fully machined finishes including rotor hats. This extra process provides better rotor balance and creates a cleaner, more finished looking component.

Power Slot brake rotors are mill balanced to a tolerance of less than 2 oz-inch. This additional machining operation reduces feedback associated with rotor vibration and provides a smooth, confident application of braking force.

Center-split core castings provide proper heat transfer and thermal efficiency, resulting in superior braking power and safety.

Power Alloy metallurgy is another unique feature in many of Power Slot's rotors. Quality and performance live inside the rotor too. Choosing the correct foundry partner and working to improve the metallurgy are all part of Power Slot's continuous improvement process that helps to reach established targets for hardness and tensile strength. Many of Power Slot's top-selling part numbers are cast using this Power Alloy iron specification, an enhancement in the carbon and molybdenum content of the iron. Carbon and molybdenum promote crack resistance and improve noise, vibration and harshness (NVH).

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 38535963030

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fussy
Alexandria, US
★★★★★ 3
Not so good….
Style: KIT
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Reviewed in the United States on August 24, 2023
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Spencer sparks
Houston, US
★★★★★ 5
Chemical guys car cleaning kit
Style: KIT
Bought for my brother and he was so happy! His favorite car cleaning brand 10/10
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Reviewed in the United States on May 8, 2026
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robert romero
Birmingham, US
★★★★★ 5
⭐⭐⭐⭐⭐ Durable Protection That Holds Up in Any Weather
Size: 65 inch, Color: Black
This grill cover is exactly what I needed. The material feels thick and heavy-duty, and it holds up great against sun, wind, and rain. The waterproof design really works—my grill stays completely dry. I also love the secure fit with the hook-and-loop straps; it doesn’t blow off in strong winds. No fading so far either. Great quality and a solid investment to protect your grill!
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Reviewed in the United States on May 26, 2026
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Diane Beach Lover
Draper, US
★★★★★ 5
Good quality, great price
Size: 72 Inch, Color: Black, Size: 72 Inch, Color: Black
Lovely cover and very well-made. I’m not using it for a grill. I am using it for my beach cruiser bike. I love the fact that it’s reflective fabric on the inside. It fits very well and it’s very lightweight and well maneuverable compared to the thicker fabrics that are sold out there. I highly recommend this item. I’ve only had it for a couple weeks, but so far very waterproof and doing the job. Easy to put on and remove.
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Reviewed in the United States on May 28, 2026
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Chelsea, US
★★★★★ 4
Good quality, water resistant
Size: 52 inch, Color: Black
Feels thinner than the one I had before this which was the same company and model. Still good quality and value for the money. Fits well and looks good. Is water resistant and black is the true color. We’ll see how sturdy it is over the years.
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Reviewed in the United States on February 19, 2026

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