SKU: 38727314818

Active Autowerke Underdrive Pulley Kit - E6x M5 / M6 (13-002)

$211.05 $234.50
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  • USA
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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28

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Description

Active Autowerke Underdrive Pulley Kit - E6x M5 / M6 (13-002)The Active Autowerke Underdrive Pulley Kit for E6x M5 and M6 is designed to optimize power delivery by reducing parasitic drag on the BMW S65 V10 engine's accessory components that share the drive belt system. This kit modifies pulley drive ratios to reduce engine load from accessories such as air conditioning and power steering, thereby unlocking additional horsepower. Crafted from aircraft grade 6061 billet aluminum with a hard black anodized finish

The Active Autowerke Underdrive Pulley Kit for E6x M5 and M6 is designed to optimize power delivery by reducing parasitic drag on the BMW S65 V10 engine's accessory components that share the drive belt system. This kit modifies pulley drive ratios to reduce engine load from accessories such as air conditioning and power steering, thereby unlocking additional horsepower.

  • Crafted from aircraft-grade 6061 billet aluminum with a hard black anodized finish for durability and quiet operation
  • Precisely engineered pulley diameter, groove pitch, and belt alignment with optimized pulley offset
  • Includes replacement drive and A/C belts for a complete bolt-on installation
  • Retains the factory crank hex drive adapter and does not alter factory harmonic dampening
  • Reduces rotational mass without causing the overheating issues associated with smaller pulley designs
  • Installation is straightforward and fully reversible, maintaining near-factory appearance
  • Compatible with other Active Autowerke performance products such as performance software and exhaust systems
  • Demonstrated power gains of approximately 10 to 12+ rear wheel horsepower on in-house dynamometer testing

This pulley kit is an effective performance upgrade for BMW M enthusiasts seeking to enhance engine efficiency by optimizing accessory drive load without compromising reliability or factory component function.

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: 38727314818

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4.8 ★★★★★
Based on 14 reviews
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Product Reviews
A
Verified Purchase
A. Dykes
Port Orchard, US
★★★★★ 5
Durable
Color: Green, Color: Green
We’ve had it for awhile now and it’s still (mostly) in one piece. Has held up well for our heavy chewing puppy. It lost a tentacle but that’s nothing compared to the level of destruction our dog has put other toys through in much shorter amounts of time. Recommend for heavy chewers and will likely buy again!
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Reviewed in the United States on February 24, 2026
A
Verified Purchase
Amazon Customer
Massapequa, US
★★★★★ 3
Not large
Color: Green
This is a lot smaller than it appears in pictures. I was going to give it to a large dog but I’m worried it would be a choking hazard. instead I’m going to give it to a pug. Seems fine quality wise just not “large”
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Reviewed in the United States on March 28, 2026
K
Verified Purchase
K.P.P.
Phoenix, US
★★★★★ 5
Absolutely EXCELLENT customer service
Color: Green
This little guy is so freaking cute and is very well made. The squeak is loud but not overly so, and the construction is really sturdy. Itis stuffed well enough it can be thrown for an impromptu game of fetch. I imagine, if you are a dog, it would be fun to chew on all the different tentacles and drag all over the place. I ordered it as a gift for my brother's pit bull, in the full knowledge it wouldn't survive the holidays, but hoping. Sadly, when it arrived it was so small! Definitely too small for such a big boy, and not even large enough for my kid's rottie/collie mix. So I did what you do in these situations: I initiated a return, stating my issue in the appropriate place To my utter shock, an hour later I had been issued a full refund with the reason they listed being they had sent me the wrong item. I do not even have to send the toy back! I didn't ask for this; it didn't occur to me to even consider it. They just did it on their own. Which is why, despite the item I received being too small, made me want to run over here and leave a great review To make sure the toy finds a loving home with a little woofer, we'll be donating it to one of the smaller local shelters. I'm sure it will be very happy with its new family
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Reviewed in the United States on January 9, 2026
A
Verified Purchase
A
Pawtucket, US
★★★★★ 5
Larger and stick well
It's hard to find larger patches particularly ones that stick well. They work well for small, shallow wounds and stay on even where skin moves a lot like on the brows or shoulder. Also because of the tapered edges, they are not very noticeable. I've never had any luck wearing makeup over any patches these included and suspect makeup works better over 8m ones, but I have managed to dot a little concealer over eyeshadow primer in the center of these patches with some success.
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Reviewed in the United States on October 2, 2023
S
Verified Purchase
Steve
Natrona Heights, US
★★★★★ 5
Work great. No irritation
I've tried several other brand and none work as well as Olive Youg at doing away with acne pimples. I highly recommend them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 3, 2025

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