MagnaFlow Conv DF 02-06 Nissan Sentra 2.5L - 51503

MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51503 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment. This direct-fit catalytic converter is designed specifically for the 2002-2006 Nissan Sentra and interchanges with OE parts 20010-4Z700 and 20010-6Z800, among others. The included gaskets & hardware reduce the possibility of a leaking seal while avoiding the need to reuse corroded factory parts for installation. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

This Part Fits:

Year	Make	Model	Submodel
2003	Nissan	Sentra	Limited Edition
2004	Nissan	Sentra	S
2002-2006	Nissan	Sentra	SE-R
2002-2006	Nissan	Sentra	SE-R Spec V

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MagnaFlow is known for producing high-performance exhaust systems. Founded in 1981, the company has earned a strong reputation in the aftermarket automotive world for creating exhaust products that improve both the sound and performance of vehicles. MagnaFlow offers a wide range of products, including cat-back exhaust systems, downpipes, mufflers, and headers, all designed to enhance engine performance by increasing exhaust flow and reducing backpressure.

One of the key features that set MagnaFlow apart is its use of stainless steel in the construction of their exhaust systems, which ensures durability and resistance to rust and corrosion. Their signature mufflers use a combination of straight-through and chambered designs, providing a deep, aggressive exhaust note while also reducing unwanted noise.

MagnaFlow’s exhaust systems are popular not only among car enthusiasts looking for a better driving experience but also among racers who need performance-oriented exhaust solutions. The company’s products are designed to be easy to install, with many offering bolt-on installation options for a hassle-free upgrade.

In addition to performance, MagnaFlow takes environmental responsibility seriously. Many of their exhaust systems feature high-flow catalytic converters, which help reduce harmful emissions without sacrificing performance. They also ensure their products comply with EPA standards, making them a legal choice for street use in many locations.

​Fidanza Performance, founded in 1997, is a leading US manufacturer of high-quality lightweight aluminum flywheels, precision adjustable cam gears, and high-performance clutches. With nearly 20 years in the automotive performance market, Fidanza is renowned for its expertise and respected globally, offering products for a wide range of vehicles, from European sports cars to modern muscle cars and imports. The company originated in racing, with founder Lou Fidanza's success in the SCCA leading to the creation of specialty parts like aluminum flywheels. Fidanza has since expanded its product line to include cam gears and performance clutches, gaining a loyal customer base and worldwide recognition. In 2023 Fidanza opened the SpeedParts4Less Marketplace which sells other manufacturers quality high performance parts!