Whether you are looking to upgrade your S55 turbos, or simply add bolt-on modifications, we have detailed mod guides ranging from intake, downpipe, and tuning guides to meth injection, and single turbos.
The M340i and M3 are both excellent performance cars from BMW. They’re both enthusiast cars that deliver great performance, handling, and driving experience. While both carry an M-badge only one of them is truly an M – the BMW M3. The M340i is known as an M-Performance car (or “M-Lite”), but isn’t truly built or…
Bootmod3 (bm3) is one of the most popular tunes in the BMW world for good reason. Pro Tuning Freaks bm3 offers a mobile app for simple flash tuning on the BMW S55 engine. They also offer a handful of off-the-shelf (OTS) flash maps with tons of awesome features. Those looking to tune their S55 should…
Finally, we’re getting around to writing about water methanol injection for the S55 M2, M3, and M4. WMI acts as additional fueling for the BMW S55, and also offers cooler intake temps. There are several other benefits to WMI that we’ll jump into in this guide. However, there are also a few risks when running…
We’re following up our S55 twin turbo upgrade guide with a similar article for single turbo kits. Many BMW enthusiasts are familiar with the S55 M3 & M4’s accomplishments. It didn’t take much time for the S55 to break into the 600whp ballpark on stock turbos. A few years later, RK Tunes broke the 1000whp…
There are so many problems with this topic. For one, the M3 and 335i aren’t even in the same ballpark when it comes to price. The M3 has also been around for decades while the 335i is limited to 2007-2015. For that reason, we’ll narrow this down to the E90 and F80 M3. Another problem…
It’s crazy BMW hasn’t learned at this point. Maybe they simply do not care. Charge pipes (CP’s) are a common failure on nearly all turbo BMW’s. Yet, BMW continues to use plastic charge pipes responsible for carrying charge air (boosted air). Generally the charge pipes hold up OK on stock boost. However, tuning for more…
If you’re interested in purchasing an S55 powered M2, M3, or M4 reliability is an important aspect to consider. As M cars, they’re certainly not cheap up-front. In this article, we will cover a few common problems with the BMW S55 engine. However, please keep in mind – this is in no way an exhaustive…
We see this question come up often with various answers. What is the max boost S55 stock twin turbos can handle? How much PSI can they handle without completely killing longevity? These are valid questions but, unfortunately, there is no one size fits all answer. In this guide, we will lay it out as straight…
We previously wrote a post about modding an S55 to make 600+whp on stock turbos. It’s pretty insane what the S55 M3 and M4 accomplish on stock turbos. However, it’s simply not enough for some. If you maxed your turbos and still want more then upgraded turbos may be for you. While the S55 is…
The BMW S55 intercooler and heat exchanger debate is a touchy subject. Not many debate that the factory S55 cooling system is capable. Especially when compared to the N54 or N55. However, some believe there are still gains to be had from aftermarket upgrades. Others believe it’s a waste of money. In this guide, we…
Dual cone intakes on twin turbo BMW’s are an excellent bolt-on mod. The factory S55 air-box is restrictive on the top-end and muffles turbo and induction sounds. However, replacing the restrictive OEM M3 & M4 system with a performance intake is a great way to extract some extra power and sound. In this guide, we…
BMW’s S55 engine comes from the factory with excellent power and torque for its small 3.0L design. However, for some, it’s simply not enough. Bolt-on mods are a popular option to push the S55 engine to 600+WHP. Upgraded downpipes (DP’s) are one of the key bolt-ons to unlock the S55’s true potential. In this guide,…
