N55

BMW N55 Upgraded Downpipe 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 … [Read more...] about BMW N55 Downpipes Guide: Catless vs. High-Flow

N55 Turbo Wastegates - EWG vs PWG 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 the pros, cons, and … [Read more...] about EWG vs PWG – BMW N55

BMW N55 Frequently Asked Questions (FAQ's) If you want to search for a specific topic use the following keys:Windows: Ctrl + FMac: Command + FWe'll break this down into the following sections:General N55 Information N55 Standard Maintenance Common N55 Engine Problems N55 Tuning & Modding*We will add to this post over time. Please drop a … [Read more...] about BMW N55 FAQ

Max Boost on Stock Turbo BMW N55 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.N55 Stock Turbo Max Boost PSI There are a few things to consider here. You don't want … [Read more...] about BMW N55 Stock Turbo Max Boost