The Ultimate BMW 335i Upgrade: Swapping to an 8HP45 Transmission

Upgrade your BMW E90 N54 335i with the ultimate performance setup — a single turbo kit combined with the 8HP45 transmission for smoother shifts, enhanced power, and a more exhilarating driving experience. The N54 engine, renowned for its twin-turbo inline-six performance, is already a favorite among BMW enthusiasts, but with the single turbo conversion, you can unlock incredible horsepower and torque potential while simplifying the turbo system for efficiency and reliability.

In this video, we walk through the installation process, setup, and benefits of upgrading the E90 335i with a single turbo kit. Paired with the 8HP45 transmission, this upgrade not only boosts power but also ensures smooth, consistent gear changes capable of handling the increased output of a single turbo N54 engine. This combination is perfect for anyone seeking track-ready performance, streetable fun, and a more refined driving experience.

The single turbo setup reduces turbo lag, optimizes spool, and allows for larger power gains compared to the stock twin-turbo system. Coupled with supporting mods like upgraded fuel injectors, intercoolers, and engine tuning, your BMW E90 335i becomes a fully capable performance machine. With proper tuning, the single turbo N54 can achieve 400+ to 600+ wheel horsepower, depending on supporting modifications, fuel type, and boost levels.

The 8HP45 transmission is a game-changer for the N54 platform. Designed to handle higher torque outputs than the stock 6-speed or previous automatic setups, this transmission provides quicker shifts, improved reliability, and better overall efficiency. When paired with a single turbo N54, the 8HP45 ensures that your power is delivered smoothly and safely, maximizing both performance and longevity.

In this video, we’ll also cover:

Installation challenges and solutions for a single turbo on the E90 N54

How the 8HP45 transmission upgrade enhances power delivery

Key components needed for a reliable high-performance build

Tips for tuning and calibration to maximize performance and safety

How this upgrade improves daily driving and track performance

Whether you’re looking to take your BMW E90 335i to the next level, compete in drag racing, or simply enjoy a thrilling street car, this single turbo + 8HP45 combination delivers unmatched performance. The N54 engine’s responsiveness, paired with smooth automatic shifting, transforms the driving experience into something truly addictive.

This is more than just a bolt-on mod — it’s a full performance transformation that brings out the best in your E90 335i. From initial turbo spool to wide-open throttle runs, this setup provides incredible acceleration, torque delivery, and reliability, giving your BMW the edge over stock models and lightly modified competitors.

Subscribe to Ty’s Autoworks Performance for more BMW builds, N54 turbo upgrades, transmission swaps, and high-performance modifications. From E60 535i N54 swaps to F82 M4 single turbo projects, this channel is dedicated to helping enthusiasts maximize their BMW’s potential while sharing tips, tricks, and tutorials for DIY and professional builds.

Keywords:
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8HP45 Swap Parts vvvvvvvvvvvvv

Canformance Website Link : https://www.canformance.net/
canformance controller : https://www.canformance.net/product/c...
plug & play harness : https://www.canformance.net/product/e...
Shifter adapter : https://www.canformance.net/product-c...
Trans oil cooler adapter : https://www.canformance.net/product/b...

Tuning:
JSRTuning - https://www.jsrtuning.com/

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