For seven generations of models, the BMW 3 series has been an icon. Introduced for the 2006 model year, the 5th generation, or e90, set a new standard in this all-around German sports car. The top of the line (non M) 3-series was the BMW 335.
The 335i came in different variants to satisfy any need. This included a four-door sedan (e90), a two-door coupe (e92), and a convertible (e93). Many non-US markets even got a wagon (e91)! No matter the number of doors you chose for your 335i, they all came with the same engine; a twin-turbocharged inline-six known as the n54.
The n54 engine was BMW’s first direct-injected turbocharged engine. Instead of having the fuel injectors placed in the intake manifold runner like port injected engines, the injector is placed directly inside of the combustion chamber. This has more efficiency potential but does have some drawbacks. First, in order for fuel to flow from an injector inside a combustion chamber, it must be at incredibly high pressure (sometimes over 3000PSI under load on the n54!). Fuel pump issues were a common fault with the early n54s. Another issue is tons of carbon build-up of the intake valves. In a traditional port-injected engine, fuel acts as a solvent as it flows over the backside of the intake valves. This helps keep them clean. But, with the injector inside of the combustion chamber, this does not occur. The BMW n54 will require routine valve cleaning maintenance typically done by walnut blasting.
From the n54, the later model e90 moved to the n55 with the exception of the 335is which retained the n54. The n55 was similar to the n54 with the main difference being it was a single turbo instead of twin-turbo. The issues above were improved on the new generation inline-six. Both the n54 and n55 are excellent engines capable of reliably producing high power if properly maintained.
The n54 marked the new era for the 3-series. From then to the current version, every 3-series could be had with a turbocharged powerplant. For any enthusiast, starting with a factory turbocharged platform offers more potential right out of the box. COBB saw this potential and wanted to give enthusiasts access.
COBB Tuning started tuning the n54 when it debuted in the 2007 USDM model year. The twin-turbocharged inline-six drew many comparisons to the legendary inline-six Toyota. In many circles, it was dubbed the German 2JZ. Depending on who you ask, that may be a bit of a stretch, but COBB saw the potential.
Right out of the box with only a tune both the n54 and n55 deliver massive gains. Throw on a few bolt-on modifications and you can make 120 horsepower and 150ft lb of torque at the wheels over stock! With that, you’re competing with the same generation m3 for a fraction of the cost.
COBB Tuning approaches design by taking the entire vehicle-platform into account as a complete system. Our ultra-high-quality products and services are professionally engineered, thoroughly tested and backed by industry leading customer service to ensure that they meet our objectives and exceed customer expectations.
We are a one-stop firm with an enviable set of qualified skills and the exceptional ability to design, engineer, manufacture, test and service our own products under one roof. Whether it’s our state-of-the-art Accessport ECU programmer, our exceptional bolt-on performance products, COBB Tuning has the experience, skill and attitude to become your ultimate, one-stop shop for all your BMW 335i performance upgrades.
Our engineers rigorously test Hard Parts to find the right order and combination for the best incremental power gains. Maps are created and tested to tune the ECU so that it supports and takes advantage of each part. With these results, COBB is able to create the Upgrade Path of Staged Packages that have all the necessary parts to upgrade your BMW 335i. You can start with Stage 1 or immediately get everything and go straight to Stage 2 or 3! Learn more about our BMW 335i performance upgrades today – The COBB Way.
Looking for BMW 335i performance parts? It all starts with the Accessport! The Accessport is the world’s best selling, most flexible ECU tuning upgrade for your 335i. Simply plug this device into your car’s OBD port and you have the capability to reflash the ECU to enjoy power gains, custom features, and other improvements immediately! All of the off the shelf maps are included at no additional cost and free updates are simplified with Accessport Manager. It’s the last engine management solution you’ll ever need!
Looking for an effective solution to eliminate inconsistent power delivery from your 335i? Look no further than the CSF Front Mount Intercooler. The factory intercooler can easily be over worked and overheated due to its size. Thus, the intake air temperatures rise causing a loss in power. Replace your factory intercooler with the CSF Front Mount Intercooler to ensure that your engine is receiving the coolest possible air, giving you more power!
COBB Tuning has the ultimate exhaust upgrades for your n54 or n55 335i. Whether you want only the cat-back for improved aesthetics and sound or the full turboback for ALL the performance, COBB has you covered.