SKU: 38775480270

Front Brake Rotor Kit (345x28mm) - BMW E46 M3 / Z3 M / Z4 M

Sale price$258.75 Regular price$287.50
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Description

Front Brake Rotor Kit (345x28mm) - BMW E46 M3 / Z3 M / Z4 MThese Rotors are side specific. This kit includes both Left & Right Rotors 34112282445 34112282446 The Zimmermann Formula Z brake disc was designed with the aim of teaming simple installation with optimum braking effect under high mechanical and thermal load. The compound brake disc developed by Zimmermann accommodates the increased demands incurred by engine tuning and optimized chassis structures. COAT Z Coat Z is a protective coating that prevents


These Rotors are side specific. This kit includes both Left & Right Rotors  34112282445/ 34112282446

The Zimmermann Formula Z brake disc was designed with the aim of teaming simple installation with optimum braking effect under high mechanical and thermal load.

The compound brake disc developed by Zimmermann accommodates the increased demands incurred by engine tuning and optimized chassis structures.

COAT-Z - Coat-Z is a protective coating that prevents rust and corrosion, extended rotor life and improved visual appearance. To improve the rust protection during storage and usage, Otto Zimmermann GmbH implements this new Coat-Z technology step by step in its production range. Beside the still optimum function of the brake disc, this coating ensures a consistent attractive appearance.

Formula Z - Bake Disc - The composite or compound brake disc named Formula Z is suitable for motorsport applications due to its special design. In contrast to the fully cast-iron brake disc, the friction ring (cast iron) and hub (aluminum alloy) are connected by steel pins. The resulting, floating construction reduces the thermal buffering of the friction ring in the operating temperature state substantially, because the friction ring can freely expand under thermal stress (e.g. when braking from high speeds or several consecutive brake applications). The use of aluminium alloy also considerably reduces the unsprung masses on the vehicle.

Material quality / high carbon - Zimmermann brake discs are usually made of cast iron (with flake graphite) of different qualities; they correspond to the material used for the original spare parts. Therefore, the utilization of such materials (referred to as High Carbon by the competition) has always been a matter of course for Otto Zimmermann.

Features and Benefits:

  • Excellent deceleration action and no distortion of friction ring at high temperatures
  • Substantial weight saving and therefore less unsprung mass
  • Floating mounting enables radial expansion of the brake disc under relatively heavy loads, thus preventing shielding and increasing resistance to heat cracks
  • Hot spots prevented by optimized design of ventilation channels
  • 1:1 exchange of original disc possible
  • Not subject to registration: general ABE certification supplied with disc
  • No conversion required for brake tuning

 

Part #'s

LEFT: 34-11-2-282-445 / 34 11 2 282 445 / 34112282445

RIGHT: 34-11-2-282-446 / 34 11 2 282 446 / 34112282446


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Exchange/Return Notes
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SKU: 38775480270

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4.8 ★★★★★
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Tamia Smith
Whiting, US
★★★★★ 5
Very soft and comfortable
Color: Black, Size: 1 inch
I really love this yoga mat. It has the perfect balance of comfort and support, so it feels soft enough on my joints but still stable for workouts and stretching. It doesn’t slide around on the floor, which makes me feel more secure during poses. The grip is really good even when I start to sweat, and it’s easy to roll up and store when I’m done. I also like that it’s thick enough to cushion my knees and back. Overall, it makes my workouts more comfortable and enjoyable, and I actually look forward to using it.
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Reviewed in the United States on April 23, 2026
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Verified Purchase
smele
Charlottesville, US
★★★★★ 5
Fantastic mat
Color: Graphite, Size: 1 inch
It's so thick and sturdy! This is super comfortable to work out on and has stood up perfectly against daily use.
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Reviewed in the United States on June 7, 2026
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Verified Purchase
Larue
West Palm Beach, US
★★★★★ 5
As Advertised.
Color: Boysenberry, Size: 1 inch
The boysenberry color is pretty. The Retrospec mat is odor-free, 7/8” thick (so close enough), dense, and non-slip on my wood floor. I wanted the density to cushion pressure points whilst performing various core exercises and general stretching on the floor. It works well for my purpose. I agree with other commenters, the 1” thick mat is too unstable for yoga. That said, the slight instability makes this mat useful for developing balance and core stability by balancing on uneven surfaces, similar to the benefits of walking on grass or trails. The mat is easily nicked by long nails (human and animal) rocks, sticks etc. so pay attention to where you set it up; however not a deal-breaker for my use. I originally looked at the BalanceFrom GoCloud mat because it is the mat that appears in several online reviews with a link to Amazon. However, once on Amazon, I noticed remarkable similarities between the GoCloud and Retrospec reviews. I suspect both mats are identical just with a different brand name and sold by different companies. I ultimately went with the Retrospec mat because the Retrospec is sold and shipped by Amazon so the benefits and protections of “Amazon Prime”, including free returns, apply. The GoCloud mat could be returned however according to the fine print, if the return wasn’t due to Seller’s error the return might be subject to a restocking fee. One of the most objectionable review comments common to both brands had to do with the mat having a terrible, lingering odor. I was willing to take a chance and order it, but would have returned it if it had a bad odor. I did not want to pay a restocking fee so went with the Retrospec mat sold and shipped by Amazon. One exception is Amazon Prime offers the GoCloud in black only. I didn’t want black because I expect to occasionally use it outside in the Florida sun and it will get really hot.
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Reviewed in the United States on May 26, 2024
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Susana
Chelsea, US
★★★★★ 5
Ideal weights
Style: 32lb Set, Style: 32lb Set
These hand weights are proving to be incredibly beneficial for our recent return to fitness routines. Their compact size makes them exceptionally well-suited for our limited living space. We have found them to be the ideal solution for incorporating strength training into our daily lives. The ease with which they can be stored further enhances their practicality. We highly recommend these weights for anyone seeking an effective and space-saving workout option.
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Reviewed in the United States on November 4, 2025
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Verified Purchase
Leigh
Carnegie, US
★★★★★ 5
Quality weights for all fitness levels
Style: 32lb Set, Style: 32lb Set
Why did you pick this product vs others?: Good quality and the stand is very sturdy.  The stand was super easy to put together and it’s held up incredibly well. I’ve used these weights almost every day for the last couple months and they aren’t showing any signs of wear. They are definitely well made were exactly what I was expecting. The stand has been knocked over and dropped many times and it still works and looks as good as the day I put it together. They are very comfortable to hold during workouts and they aren’t slippery when your hands get sweaty. I would definitely recommend these! 
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Reviewed in the United States on July 10, 2025

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