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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Alright, first of all I LOVE the packaging and the spray bottle. Absolutely adorable! Aesthetics are off the charts. As for the actual power and look of the glitter, it is pretty good. I tried to take photos of it on my hands/arms but the camera has a really hard time picking up the small glitter. In person it will give you a shiny or shimmery look rather than coated in gold. Not quite what I was hoping for, but definitely a cool look! The spray is quite powerful, so be aware of where you are putting it on. It is very easy to apply, just keep in mind that glitter will go EVERYWHERE. It also comes off easily enough either by rubbing a cloth or washing with water.
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Kat
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★★★★★ 5
Good quality and my dogs love them.
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My dogs love these! I have small dogs so I cut these into 3 or 4 pieces each. I like having healthy treats for them and I buy several treat products from this company.
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Reviewed in the United States on May 17, 2026
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Yugen
Massapequa, US
★★★★★ 5
Great for medium dogs
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Dogs love them! I have 2 dogs 1 is a big chewer (cavalier king charles spaniel) and a mutt our cavi takes these things down but surprisingly it lasts him a while which is good! Our mutt loves them too!
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Reviewed in the United States on May 5, 2026
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Chelsie Oldham
Fort Morgan, US
★★★★★ 5
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My maltipoo loves these. Likes them better then the individual ones I get at tractor supply.
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Teri Wade
Houston, US
★★★★★ 4
Too expensive!
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These are the best pig ears for my dogs but they are too expensive. Bring the price down. After all they are just pig ears. ☺️
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Reviewed in the United States on November 20, 2025

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