DOCTOR DIESEL USA DD-478-P High Flow Passenger Manifold 5.7L

( Brand: Doctor Diesel Usa ), ( Mounting Style: Bolt-on ), ( Items Included: Gasket, Mounting Hardware, Shield ), ( Color: Black ), ( Manufacturer Part Number: DD-478-P ), ( Material: Cast Iron ), ( Vintage Part: No ), ( Materials Sourced From: United States ), ( Placement On Vehicle: Front, Left, Right ), ( Fuel Type: Gasoline ), ( Type: Exhaust Manifold ), ( Substrate Material: Iron ), ( Oe/oem Part Number: 1041463, 1041464, 1041465 ), ( Manufacturer Warranty: 3 Years ), ( Features: Heat-resistant, Left Right Exhaust ), ( Universal Fitment: Yes )

Review DOCTOR DIESEL USA High Flow Passenger Side Manifold Dodge 5.7l fits RAM HEMI 1500 2500 3500 2009–2024

The Doctor Diesel DD-478-P High Flow Passenger Manifold is an excellent upgrade for Dodge Ram 1500, 2500, and 3500 models equipped with the 5.7L Hemi engine from the years 2009 to 2024. This high-performance manifold is designed to deliver improved airflow and increased horsepower, making it an excellent choice for those seeking enhanced engine performance.

The DD-478-P manifold is meticulously crafted from 304 stainless steel, ensuring durability and resistance to corrosion, even in the harshest conditions. Its unique design features a 90-degree inlet and 45-degree outlets, which not only provides better clearance but also facilitates optimal engine tuning.

This high-flow manifold features larger runners, which significantly increase the volume of air that can be delivered to the cylinders, resulting in better combustion efficiency and increased power output. The manifold's ports are also CNC-machined, ensuring precise fitment and optimal engine performance.

The Doctor Diesel DD-478-P High Flow Passenger Manifold is designed to work seamlessly with your factory fuel system, making installation a straightforward process. It is compatible with factory fuel injectors and does not require any additional modifications, making it a great choice for those looking for a bolt-on power upgrade.

In summary, the Doctor Diesel DD-478-P High Flow Passenger Manifold is an excellent investment for Dodge Ram owners looking to enhance the performance of their 5.7L Hemi engine. Its durable construction, improved airflow, and seamless compatibility with factory components make it a reliable and effective upgrade for your vehicle.

The Doctor Diesel DD-478-P high flow passenger manifold is a popular aftermarket upgrade for the 09-24 Dodge Ram 1.5L, 2500, and 3500 models with a 5.7L Hemi engine. This manifold aims to improve engine performance by increasing airflow to the intake side of the engine. Let's discuss some pros and cons of purchasing this product.

1. Enhanced Airflow: The primary benefit of this manifold is the improved airflow it provides to the engine. This can lead to increased horsepower, torque, and overall engine performance.

2. Durability: The Doctor Diesel DD-478-P manifold is made from high-quality materials, including cast aluminum, which can withstand the rigors of heavy-duty use and provide excellent heat dissipation.

3. Increased Fuel Efficiency: By improving airflow and engine performance, the manifold can also contribute to increased fuel efficiency, making your vehicle more cost-effective to operate.

4. Enhanced Sound: The manifold's design can result in a more aggressive engine sound, which some enthusiasts may appreciate.

1. Complex Installation: Installing the Doctor Diesel DD-478-P manifold can be a complex process, requiring specialized tools and knowledge. It may be necessary to hire a professional to ensure a proper installation.

2. Cost: The manifold is a relatively expensive upgrade, particularly compared to other performance modifications.

3. Potential for Check Engine Light: Some customers have reported issues with the check engine light coming on after installing the manifold. This may require additional diagnostic work and additional costs.

In conclusion, the Doctor Diesel DD-478-P high flow passenger manifold can provide significant performance improvements for Dodge Ram Hemi engines. However, it comes with a complex installation process, cost, and potential check engine light issues. If you're willing to invest in the upgrade and have the necessary resources for installation, it can be a worthwhile investment for those seeking increased power and improved fuel efficiency.

Recommendation: Before purchasing the Doctor Diesel DD-478-P manifold, carefully consider the pros and cons and weigh them against your specific needs and budget. It may be helpful to consult with a professional mechanic or Dodge Ram enthusiast community for advice and insights. Additionally, be prepared for the potential costs associated with installation and any potential diagnostic work required to address the check engine light issue.

part # dd478 prices

• $399.99-$429.99

specifications maniheader:

• for models: 1500, 2500, 3500, Ram, Hemi
• for makes: Dodge
• for years: 2009-2024
• brand: Doctor Diesel Usa
• mounting style: Bolt-on
• items included: Gasket, Mounting Hardware, Shield
• color: Black
• manufacturer part number: DD-478-P
• material: Cast Iron
• vintage part: No
• materials sourced from: United States
• placement on vehicle: Front, Left, Right
• fuel type: Gasoline
• type: Exhaust Manifold
• substrate material: Iron
• oe/oem part number: 1041463, 1041464, 1041465
• manufacturer warranty: 3 Years
• features: Heat-resistant, Left Right Exhaust
• universal fitment: Yes

payments maniheader:

• other
• money order
• wallet: Paypal
• credit card: Diners-club

shipping maniheader:

• class: Standard
• service: USPS Ground Advantage
• cost: $86.43
• type: Calculated
• carrier: USPS
• transit: 4-10 Days

offer maniheader:

• best offers: True
• options: Ship-to-home
• availability: In Stock
• started: December 16, 2025
• quantity: 1
• sold: 0

returns maniheader:

• policy: No Returns

general maniheader:

• condition: New
• Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers

seller maniheader:

• rating: 100.0%
• # reviews: 56

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