Our page dedicated to the amazing BMW N55 3.0 inline-6 turbo engine. We have tons of content for the N55, and we’re always adding more. Don’t miss our N55 400+hp guide or N55 engine problems article. We also have tons of content about N55 upgrades such as N55 fueling mods, turbo upgrades, and so much more!
Charge pipes are a common discussion on turbo BMW engines. The charge pipe (CP) is partly responsible for carrying charge air (or boosted air) to the engine. Unfortunately, BMW’s N55 engine uses a plastic charge pipe. The N55 charge pipe is prone to cracking and popping off at higher than stock boost levels. It’s not…
These posts are challenging to write because best is subjective. Spoiler alert – we’re not going to say one year 335i is better than another. We’ll break down the differences by year and allow the reader to decide. How to Pick the Best 335i For You Before we dive into a year-by-year breakdown let’s touch…
We’re finally following up our general MHD post. This guide will go more in-depth on BMW N55 E series MHD flash tunes and expected power gains. All E series N55’s use PWG. However, some F series are also PWG rather than EWG. The F series uses a different MHD app, so we will write a…
Some refer to the BMW E90 (E9x) 3 series as one of the last great true drivers cars from BMW. The preceding E46 chassis was so good and left the E90 with big shoes to fill. Initially, many didn’t believe the E9x chassis to be as good. However, with newest E46’s nearing 15 years old…
Upgraded performance intakes are a great way to free up engine sound and power on turbo cars. The N55 is no exception. Performance intakes are one of several popular bolt-ons that can boost the N55 to the next level. In this guide, we will discuss the performance benefits of upgraded intakes and list a few…
An often overlooked performance upgrade on the N55 is the cooling system. When you’re focused on horsepower, it doesn’t seem too appealing to spend $500 on a “mod” that doesn’t really produce meaning performance gains. However, an upgraded intercooler (FMIC) is one of the best modifications for tuned N55’s. Rather than being touted as a…
The exhaust downpipe is the first part of the exhaust system on the N55 engine. It bolts-up straight to the turbocharger and passes air from the turbo to the cat-back portion of the full exhaust system. The OEM downpipes have catalytic converters on them, for emissions purposes. However, the catalytic converters are extremely restrictive and…
What is the difference between PWG and EWG N55 engines? This question comes up often and is a big talking point regarding the N55’s performance. EWG and PWG refer to the turbocharger wastegates. Though it sounds like a minor difference, the wastegates play an important role in tuning and power. Let’s jump in and examine…
If you want to search for a specific topic use the following keys: Windows: Ctrl + F Mac: Command + F We’ll break this down into the following sections: If you are looking for a long-form article that goes into detail about N55 specs, modifications, common engine problems, and reliability, check out our Ultimate BMW…
This question comes up frequently. What is the max boost the N55 stock turbo can handle? How much PSI is realistic on the stock turbo without killing longevity? While there is no exact science, let’s jump in and examine the limits of the N55 stock turbo. BMW N55 Stock Boost Factory N55 boost levels are…
MHD offers flash tunes for the turbo BMW N54, N55, S55, B58, and N13 engines. Their app is easy to use and makes tuning your BMW a breeze. However, the app is only available on android devices. Unfortunately, Apple prohibits the use of 3rd party USB cables, so iOS is out of luck (not completely)….
Ever since the twin turbo N54 hit the markets in the 2007 BMW 335i, BMW has been building on the design of the turbocharged, direct injected inline 6 engine. In 2010, the 335i received the updated N55 engine followed by the B58 in 2016, however, the model was rebranded to the 340i. Unsurprisingly, the success…
