Many Bmw 325i (E90) owners are looking to enhance their vehicle’s performance. A popular and effective upgrade involves installing a variable length intake manifold, similar to what’s found in the 330i models. This modification, combined with an ECU remap, can significantly boost your 325i’s power.
The standard BMW 325i with the N53 3.0L engine produces 218hp and 270Nm of torque. However, with the performance package offered by Mosselman Turbo, which includes a variable length intake manifold and a specialized ECU remap, you can achieve 330i specifications, reaching 272hp and 320Nm of torque. This upgrade effectively unlocks the hidden potential of your engine.
Installation of the variable length intake manifold, as experienced by a BMW owner at MStyle, is a comprehensive process that may take a significant portion of a day. The difference in performance is immediately noticeable after the upgrade. Drivers report a “savage difference” across all gears and throughout the rev range. This is attributed to the variable length intake manifold optimizing air intake at different engine speeds. As the dyno sheet from Mosselman Turbo demonstrates, the tuned engine delivers a less flat power curve, with the intake valves opening at approximately 3250 rpm and 4500 rpm. This results in a more engaging and aggressive driving experience, especially in the engine’s mid-range.
While dyno testing wasn’t performed post-installation in the reported experience, the subjective improvement in driving performance was undeniable. For BMW 325i owners seeking a substantial power increase, this performance package presents a compelling upgrade path. The combination of the variable length intake manifold and ECU remap transforms the driving dynamics of the 325i, bringing it closer to the performance levels of the 330i.
