- Power Gain: 75hp
- Torque Gain: 44ft-lbs
The Speed-Buster Power Module is a simple plug and play 135i/335i/535i N54 power upgrade that delivers big power gains with no downside. The installation is simple - just 2 sensors - making it the easiest power gain you'll ever do. By sending modified signals back to the engine computer, the Speed-Buster tricks the computer into safely raising the boost. And with careful programming of operational tables, the Power Module doesn't trigger torque limiters, monitors, or limp mode, which means safe power that won't kill your engine - or warranty!
Inside the Speed-Buster tuning box is a sophisticated programming module, tuned specifically for the N54 engine on Speed-Buster's MAHA dyno. All development, tuning, and production are done in-house at their German facility. Speed-Buster's programming works seamlessly with the factory ECU to give an impressive increase in power with factory-levels of driveability and smoothness. All factory overboost protections remain in place and the system can be uninstalled at any time. A bypass plug is also included that allows stock operation without component removal if you want your BMW to appear stock. The Power Module works independently from the factory BMW ECU so it's unaffected by software updates and revisions, and all OBD diagnostics and service functions are untouched.
Installation is fast and easy - simply unplug the factory connectors for the designated sensors on the N54, plug into the Speed-Buster harness, and plug the Speed-Buster connector into the sensors. The harness uses factory-type connectors for a positive and weatherproof connection and an OEM appearance.
Speed-Buster is the
premium German tuning module brand. All harnesses, modules, and circuit boards are premium quality, made in-house in the Speed-Buster facility in Germany. No need to pay hundreds of dollars more to buy this component elsewhere in a different box, or risk getting a lesser-quality part! We have researched extensively, and proudly sell the premium Speed-Buster product line.Notice of Emissions Non-Compliance.
This software was developed and tuned on vehicles that retained all emissions controls. It is intended for vehicles with stock and fully functional emissions equipment. However, it has not been submitted nor tested for approval in California. Therefore, it is not legal for installation or use in California on any pollution controlled motor vehicle. Not legal for installation or use on any pollution controlled motor vehicle in any state, province, or jurisdiction governed by, or which has adopted, CARB or EPA regulations.
BMW Fitments:1 Series
E82 / E88 (08-10) > 135i3 Series
E90 / E91 / E92 / E93 (06-10) > 335i
E90 / E91 / E92 / E93 (06-10) > 335xi5 Series
E60 / E61 (04-10) > 535i
E60 / E61 (04-10) > 535xiX Series
E71 X6 (08-10) > X6 xDrive35iZ Series
E89 Z4 (09-16) > Z4 sDrive35i