BORG WARNER S-421 Nos 2806945

( Brand: Borg Warner ), ( Manufacturer Part Number: S-421 ), ( Ipn: 2806945 )

Review BORG WARNER Nos Automotive Part Vintage Oem New Old Stock

The Borg Warner S-421 series of automotive fuel pressure regulators is a high-performance solution designed to maintain optimal fuel pressure in various applications. These regulators are engineered to deliver consistent and accurate fuel pressure readings, ensuring reliable engine performance and efficient combustion.

The S-421 regulators feature a robust, cast iron construction that ensures durability and resistance to thermal shock. The internal mechanism includes a diaphragm-operated valve, which is designed to provide precise fuel pressure regulation. The diaphragm material is made of a high-quality elastomer that offers excellent flexibility and resistance to wear and tear.

The S-421 regulators also include a adjustable spring mechanism that allows for easy calibration to specific fuel pressure requirements. The spring tension can be adjusted using a simple external screw, making it a versatile solution for a wide range of engines and fuel systems.

Moreover, the regulators are designed to be easy to install, with a straightforward bolt-on design that requires no special tools or modifications. They come with a fuel inlet and outlet port, as well as a vacuum port, which can be connected to the engine intake manifold or a separate vacuum source.

The S-421 regulators are suitable for use in both gasoline and diesel engines, making them a versatile choice for a wide range of automotive applications. They are also compatible with various fuel systems, including both mechanical and electronic fuel injection systems.

In summary, the Borg Warner S-421 series of fuel pressure regulators is a high-quality, durable, and versatile solution for maintaining optimal fuel pressure in various automotive applications. With their adjustable spring mechanism, robust construction, and easy installation, they offer reliable and consistent performance that is essential for optimal engine performance.

Borg Warner S-421 NOS (Nitro-Oxide Systems) are aftermarket throttle body assemblies designed for use in various automotive applications. These assemblies use Nitro-Oxide to control fuel delivery, enabling better engine performance and response. Here are some pros and cons of buying Borg Warner S-421 NOS:

1. Improved Performance: Borg Warner S-421 NOS can provide significant improvements in engine performance, including increased horsepower and torque.

2. Better Throttle Response: The use of Nitro-Oxide in the S-421 NOS allows for quicker throttle response, resulting in smoother and more responsive acceleration.

3. Fuel Efficiency: Despite delivering more power, the S-421 NOS can also offer improved fuel efficiency due to its precise fuel delivery.

4. Durability: Borg Warner is a reputable brand known for manufacturing high-quality automotive components. The S-421 NOS is no exception, offering durability and reliability.

1. Cost: The Borg Warner S-421 NOS is a premium aftermarket product, and its cost may be a significant deterrent for some buyers.

2. Complexity: Installing a Borg Warner S-421 NOS requires a certain level of automotive knowledge and experience. It may not be a suitable DIY project for inexperienced users.

3. Maintenance: The use of Nitro-Oxide in the S-421 NOS requires regular maintenance to ensure the system remains operational. This includes periodic refills and pressure checks.

Borg Warner S-421 NOS offers significant performance improvements and better throttle response for automotive enthusiasts. However, its high cost, complexity, and ongoing maintenance requirements may not make it a suitable option for all buyers. Ultimately, the decision to purchase a Borg Warner S-421 NOS depends on your automotive goals, experience, and budget.

If you are an experienced automotive enthusiast looking for significant performance gains and improved throttle response, the Borg Warner S-421 NOS may be a worthwhile investment. However, if you lack the necessary experience or budget for the installation and ongoing maintenance, alternative performance upgrades may be more suitable for your needs.

Details:

NOS Borg Warner S-421 Automotive Part Vintage OEM New Old Stock Recent Estate Sale Find Please See Pictures As They Are A Of The Well.

part #: s421 price

• $19.99

specifications geashif:

• brand: Borg Warner
• mpn: S-421
• ipn: 2806945

returns geashif:

• policy: No Returns

shipping geashif:

• cost: $10.50
• type: Calculated
• class: Standard
• carrier: USPS
• service: USPS Ground Advantage
• transit: 5-12 Days

general geashif:

• condition: New
• Car Truck Parts Accessories > Transmission Drivetrain > Shifters, Cables Linkages

payments geashif:

• other
• wallet: Paypal
• credit card: Visa

offer geashif:

• started: August 14, 2025
• options: Ship-to-home
• best offers: True
• availability: In Stock
• quantity: 1
• sold: 0

seller geashif:

• city: San Martin, California
• rating: 96.7%
• # reviews: 10109

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