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Description
Wavetrac Differential - BMW / E92 335iS / F10 550i / E90 335D / E87 135i / E89 Z4BMW F10 550i & E90 335D (215K) with welded ring gearE92 335iS DCT (dual clutch trans) with welded ring gearE87 135i DCT with welded ring gearE89 Z4 35i DCT, Z4 35is DCT with welded ring gearWavetrac diffs are state of the art helical gear differentials designed, developed, and manufactured in the USA by Autotech Driveline. The Wavetrac Differential is the only torque biasing differential on the market with patented technology that mitigates wheelspin
BMW F10 550i & E90 335D (215K) with welded ring gearE92 335iS DCT (dual clutch trans) with welded ring gear
E87 135i DCT with welded ring gear
E89 Z4 35i DCT, Z4 35is DCT with welded ring gear
Wavetrac diffs are state-of-the-art helical gear differentials designed, developed, and manufactured in the USA by Autotech Driveline. The Wavetrac Differential is the only torque biasing differential on the market with patented technology that mitigates wheelspin when an unloaded wheel condition arises. During zero axle load conditions, the Wavetrac cam device acts to create internal load, maintaining drive on the gripping wheel instead of acting like an open diff (and going nowhere!). Super strong 9310 alloy steel gears are enclosed in case-hardened steel bodies, held together with ARP fasteners. All Wavetrac differentials include a transferable, Limited Lifetime Warranty. 10 BMW M12x1.5x24 bolts 33121205561 or 10 ARP bolts N.M12.150.24 required if performing your own welded ring gear service (already included with our "Install Kit").
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4.8 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Removing Peach-Fuzz from your face :)
Before I ordered this item I did not know how important it would be to remove peach puzz from my face. By removing the tiny peach fuzz from my face, I am creating the smoothest possible surface for my skin, and for my makeup. I never truly understood this until I tried this method & saw the amazing results. (Being vision impaired, I also never really saw how much peach fuzz a normal human being has... until I used this item.)
I highly recommend this item for anyone who wants to take care of their complexion and how their makeup and skin looks on a daily basis. I still can't believe it, but it's a real game changer! (Oh & by the way, these things fold in half, so the blade is covered and it can be carried in your makeup purse without any danger to you.) Enjoy!! 💖 XO
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Reviewed in the United States on February 17, 2025
★★★★★ 3
Cut my face
I’ve tried several brands of derma blades in recent years. This is the first one that cut my face in several places. It definitely thoroughly removed facial hair and exfoliated well but be careful. It also felt a little cheap and too lightweight which made it difficult to maneuver.
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Reviewed in the United States on July 31, 2023
★★★★★ 5
Work nicely
These work beautifully and last a long time! Definitely worth it.
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Reviewed in the United States on February 21, 2026
★★★★★ 1
Poor product
Blade was not sharp enough to remove hair. The raggedy blade scratched and but my face. Very disappointed. My granddaughter had a different brand of this item and it was so smooth removing the hair.
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Reviewed in the United States on January 24, 2026
★★★★★ 5
I absolutely loved this book.
Format: Paperback
“This book is about creativity, based on histories of contemporary people who know about it firsthand. It starts with a description of what creativity is, it reviews the way creative people work and live, and it ends with ideas about how to make your life more like that of the creative exemplars I have studied. There are no simple solutions in these pages and a few unfamiliar ideas. The real story of creativity is more difficult and strange than many overly optimistic accounts have claimed. For one thing, as I will try to show, an idea or product that deserves the label ‘creative’ arises from the synergy of many sources and not only from the mind of a single person. It is easier to enhance creativity by changing conditions in the environment than by trying to make people think more creatively. And a genuinely creative accomplishment is almost never the result of a sudden insight, a lightbulb flashing on in the dark, but comes after years of hard work.”
~ Mihaly Csikszentmihalyi from Creativity
Creativity with a capital C—the type of Creativity that changes the world.
How can we go about cultivating it in our lives? That’s what this book is all about.
Our guide is Mihaly Csikszentmihalyi—one of the founders of the positive psychology movement. Csikszentmihalyi (pronounced “cheeks sent me high”) is a professor at Claremont Graduate University and the former Chair of the Department of Psychology at the University of Chicago who wrote the classic book Flow: The Psychology of Optimal Experience .
This book features the wisdom gained from over three decades of research along with over one hundred interviews with extraordinary people—from scientists and business leaders to artists and poets.
Warning: Although deeply insightful, it’s not an easy read. If you’re looking to understand creativity at a deeper level via one of the world’s leading (and legendary) psychologists then I think you’ll enjoy it as much as I did.
Here are some of my favorite Big Ideas:
1. What is Creativity - Domain + field + person.
2. Attention - + Being kind weird
3. Complexity - + Resolving dischotomies.
4. Rhythms - Your ideal days?
5. Creativity + Flow - The 9 elements
Well, there we go. That’s a super quick look at this great book. Time to get our flow on as we tap into our Creativity and optimize + actualize!
More goodness— including PhilosophersNotes on 300+ books in our *OPTIMIZE* membership program. Find out more at brianjohnson . me.
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Reviewed in the United States on May 10, 2016