Stoptech Front Cross Drilled Rotors - E9X 335i (348X30mm)
SKU: 37055113119

Stoptech Front Cross Drilled Rotors - E9X 335i (348X30mm)

Sale price$241.20 Regular price$268.00
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Description

Stoptech Front Cross Drilled Rotors - E9X 335i (348X30mm)Stoptech Cross Drilled rotors are 1 piece, drilled, 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. 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, Stoptech Cross Drilled



Stoptech Cross-Drilled rotors are 1-piece, drilled, 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. 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, Stoptech Cross-Drilled covers more than 2500 applications, all machined in Stoptech Cross-Drilled California manufacturing center. Every Stoptech Cross-Drilled rotor is a direct replacement for a factory brake rotor, allowing the retention of factory calipers in the system.

 

Most Stoptech Cross-Drilled rotors match the original factory cooling vane design. In the most popular sports car and light truck applications, Stoptech Cross-Drilled 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.

 

Every Stoptech Cross-Drilled 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.

 

Stoptech Cross-Drilled 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.

 

Stoptech Cross-Drilled 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.

 

Stoptech Cross-Drilled 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 Stoptech Cross-Drilled'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 Stoptech Cross-Drilled's continuous improvement process that helps to reach established targets for hardness and tensile strength. Many of Stoptech Cross-Drilled'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: 37055113119

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Brittney Oliver
Los Angeles, US
★★★★★ 5
Great Quality
My son Loves this Jacket. He specifically asked for one for Christmas and this one met his every expectation. It is great quality. It is thick and warm without being too bulky. I sized up for him since he is a growing teenager and it still fits great and he will be able to wear it next winter too if he wants.
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Reviewed in the United States on February 20, 2026
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Ridwan Omar
Natrona Heights, US
★★★★★ 4
Cotton as Stylish as Snow
So far, after only wearing it a handful of days, I have already fallen deeply in love with this jacket. With its quality fleece jean material and stylish look, it's arguably climbed at record speed to being my favorite winter jacket thus far. It won't exactly cut it for the days of extreme cold, but it's practically perfect for those high 30s to low 50s degree Fahrenheit weather! The cotton on the inside is both soft and warm, and the overall fit of it hits a perfect sweet spot of being weighty without feeling too hefty or dragging on the body. The pockets aren't the deepest in the world, but with four of them, they'll be more than able to carry an decently sized arsenal of your everyday items. It lays on nicely, and is able to be worn with an extra layer or two underneath, in case a bit of extra warmth is needed. The only caveat that I could give it, hence why I gave it 4 stars instead of 5, is that if you choose to dawn on clothes that are rather lint susceptible, this jacket will be a direct enemy to it. But that is where the criticisms start and end, and is why I wish there were a way to give a product a 4.5 stars review here on Amazon. Otherwise, this is a must buy for anyone looking for a winter jacket that packs a bit more visual finesse than a typical puffer jacket. If only I had the sense to buy a winter jean jacket such as this one sooner rather than later!
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Reviewed in the United States on February 21, 2026
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Monica Hastie
Cuba, US
★★★★★ 5
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Size: X-Large, Color: Black-grey Lined
Perfect fit. Color and quality were great! Awesome jacket for the money
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Reviewed in the United States on January 9, 2026
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Prajina
Louisville, US
★★★★★ 5
Absolutely loved this
First of all, I loved that it came in a nice transparent bag. And it is the perfect fit. The inside is lined sherpa fleece, which is really warm in freezing temperature. The outside is denim material. It's not stretchy but is soft from inside. The color I got is dark brown.
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Reviewed in the United States on December 30, 2025
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Indiana homestead
Phoenix, US
★★★★★ 3
Runs small if you are wearing layers
Runs small
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Reviewed in the United States on January 21, 2026

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