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The N55 engine, a turbocharged inline-six, has gained popularity among car enthusiasts for its tuning potential. With the right modifications, achieving over 370 horsepower is possible, especially with Stage 2 mods. In this article, we will break down the costs associated with these modifications and discuss the components needed to reach this power level.
Understanding the N55 Engine
The N55 engine is known for its robust performance and tuning capabilities. It is found in various BMW models, including the 135i, 335i, and the Z4. The engine features a twin-scroll turbocharger, which enhances throttle response and overall efficiency.
Stage 2 Modifications Overview
Stage 2 modifications typically include a combination of upgrades to the intake, exhaust, and tuning. These changes allow the engine to breathe better and produce more power. Below is a list of common Stage 2 mods for the N55 engine:
- High-flow downpipe
- Upgraded intercooler
- Performance air intake
- ECU remapping or tuning
- Upgraded fuel pump
Cost Breakdown of Stage 2 Mods
Understanding the costs associated with each modification is crucial for budgeting your build. Below is a detailed breakdown of the estimated costs for each component needed to achieve 370+ hp on the N55.
High-Flow Downpipe
A high-flow downpipe is essential for reducing exhaust backpressure and improving turbo efficiency. The cost for a quality downpipe typically ranges from $300 to $800.
Upgraded Intercooler
Upgrading the intercooler helps to lower intake temperatures, which is crucial for maintaining performance. Expect to pay between $400 and $1,200 for a good intercooler.
Performance Air Intake
A performance air intake system increases airflow to the engine, promoting better combustion. The price for an aftermarket intake can range from $200 to $500.
ECU Remapping or Tuning
Tuning the ECU is a vital step to unlock the full potential of your modifications. Professional tuning services usually cost between $500 and $1,500, depending on the tuner and the complexity of the tune.
Upgraded Fuel Pump
To support increased power levels, an upgraded fuel pump may be necessary. The cost for a performance fuel pump typically ranges from $200 to $600.
Total Estimated Costs
Now that we have outlined the individual costs, let’s summarize the total estimated costs for achieving 370+ hp on the N55 with Stage 2 modifications:
- High-flow downpipe: $300 – $800
- Upgraded intercooler: $400 – $1,200
- Performance air intake: $200 – $500
- ECU remapping or tuning: $500 – $1,500
- Upgraded fuel pump: $200 – $600
The total estimated cost can range from approximately $1,600 to $4,600, depending on the quality of parts and labor involved.
Conclusion
Achieving over 370 horsepower on the N55 engine with Stage 2 modifications is attainable with the right parts and tuning. While the costs can add up, the performance gains and driving experience can be well worth the investment. Always ensure to choose reputable brands and professional tuners to get the best results from your modifications.