The 335d Delete Kit is a popular modification for BMW 335d owners seeking enhanced performance and fuel efficiency. By removing the Diesel Particulate Filter (DPF) and associated components, the kit can significantly alter the vehicle’s exhaust system. This comprehensive guide explores the benefits, installation process, and important considerations associated with the 335d delete kit.
Understanding the 335d Delete Kit: What’s Included?
A typical 335d delete kit includes a DPF delete pipe, which replaces the restrictive factory DPF, and often includes a software tune to disable related fault codes. Some kits also include components for deleting other emissions equipment like the Exhaust Gas Recirculation (EGR) system. Options range from basic kits that retain the factory muffler to comprehensive systems that replace the entire exhaust from turbo back.
Power and Performance Gains with a 335d Delete Kit
Removing the DPF significantly reduces exhaust back pressure, allowing the engine to breathe more freely. This translates to noticeable gains in horsepower and torque, often exceeding 30hp and 60lb-ft. Coupled with a performance tune, a 335d delete kit can unleash the full potential of the engine.
Graph showing horsepower and torque increase with a 335d delete kit
Installation of a 335d Delete Kit
While some mechanically inclined individuals may opt for a DIY installation, professional installation is recommended. The process involves removing the factory DPF and associated sensors, installing the delete pipe, and flashing the ECU with updated software.
Essential Tuning for Your 335d Delete Kit
Tuning the Engine Control Unit (ECU) is crucial for proper operation after installing a 335d delete kit. The tune disables the DPF regeneration cycle and eliminates potential check engine lights related to the removed components. Tuning options vary, from economy tunes focused on fuel efficiency to performance tunes maximizing power output. Choosing between bench flashing the ECU or using a handheld Flashzilla device depends on the specific vehicle and tuning method.
Addressing Common Concerns: 335d Delete Kit FAQs
Will my car make black smoke? While some black smoke is possible under heavy acceleration, a properly tuned 335d with a delete kit should not produce excessive smoke. “Rolling coal” is not the intention of this modification.
Will my clutch handle the increased torque? In most cases, the factory clutch can handle the moderate torque increases from a delete kit. However, aggressive driving or further modifications may necessitate a clutch upgrade.
What about emissions? It’s important to acknowledge that removing emissions equipment is illegal for on-road use in most jurisdictions. 335d delete kits are generally intended for off-road or track use only.
Long-Term Reliability and Warranty Considerations
Deleting the DPF can actually improve long-term reliability by eliminating potential failure points associated with the DPF system, such as clogging, sensor issues, and exhaust flap malfunctions. However, modifications may void portions of the vehicle’s warranty. Consulting with a dealership beforehand is recommended.
Fuel Economy Improvements with a 335d Delete Kit
While individual results vary, many 335d owners report improved fuel economy after installing a delete kit, often seeing a 5-8 MPG increase. This is attributed to reduced exhaust back pressure and optimized engine performance.
Choosing the Right 335d Delete Kit for Your Needs
Consider factors such as budget, desired sound level, and emissions regulations when selecting a 335d delete kit. Options range from basic DPF delete pipes to full turbo-back exhaust systems with resonators and high-flow catalytic converters. Researching different options and consulting with reputable vendors is crucial. Remember to factor in the cost of professional installation and tuning.
