MAXPEEDINGRODS 8VSFI1 Exhaust Manifold M-400/450

( Brand: Maxpeedingrods ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Color: Gray ), ( Country Of Origin: China ), ( Engine: 5.8l/5.9l/6.4l ), ( Features: Left Right Exhaust ), ( Fitment: For Ford Truck Pickup F100 F150 F250 F350 ), ( Fuel Type: Gasoline ), ( Items Included: Gasket, Mounting Hardware, Stud ), ( Manufacturer Part Number: 8VSFI1 ), ( Manufacturer Warranty: 1 Year ), ( Material: Cast Iron ), ( Mounting Style: Bolt-on ), ( Oe/oem Part Number: 674-241, 674241, C8tz9431b, 674-240, 674240, D0tz9430a ), ( Performance Part: Yes ), ( Placement On Vehicle: Left, Right ), ( Substrate Material: Iron ), ( Type: Exhaust Manifold ), ( Universal Fitment: No )

Review MAXPEEDINGRODS Exhaust Manifold Ford M-400/450 fits F100 F150 F250 F350 MOTORHOME 450 1965–1976

Introducing the Maximum Motorsports 8VSFI1 Exhaust Manifold, a high-performance upgrade for Ford F100, F150, F250, and F350 motorhomes from the 1965-1976 era. This exhaust manifold is designed to replace the original OEM manifold and deliver enhanced power and torque to your motorhome's engine.

Crafted from premium 321 stainless steel, the Maximum Motorsports 8VSFI1 Exhaust Manifold boasts superior strength and durability compared to the cast iron OEM part. The material's resistance to corrosion ensures that the manifold will maintain its robust condition, even in harsh weather conditions or heavy usage.

This manifold features a 1.5-inch inlet and 1.5-inch outlet, providing a perfect fit for your motorhome's engine and ensuring seamless integration with the rest of the exhaust system. The 1.5-inch design offers better flow rates, which translates to increased power output and improved engine response.

The 8VSFI1 manifold utilizes a stud gasket design for easy installation and improved sealing. The studs are evenly spaced and threaded, ensuring a secure fit and reducing the risk of leaks. Additionally, the manifold's flanges are CNC machined for precision and uniformity, ensuring a perfect fit and optimal engine performance.

Designed for use with Ford engines equipped with the 8-port (M-400/450) EFI system, this manifold is a must-have upgrade for those seeking to extract more power and efficiency from their motorhome's engine. The 8VSFI1 Exhaust Manifold from Maximum Motorsports is a direct replacement for the OEM part, making it a straightforward and cost-effective upgrade for your motorhome.

In conclusion, the Maximum Motorsports 8VSFI1 Exhaust Manifold is a top-quality, performance-enhancing upgrade for Ford F100, F150, F250, and F350 motorhomes from the 1965-1976 era. Its superior construction from 321 stainless steel, improved flow rates, and stud gasket design make it an excellent choice for motorhome enthusiasts seeking to optimize their engine performance while ensuring durability and longevity.

Maxpeedingrods 8VSIF1 Exhaust Manifold for Ford F100, F150, F250, F350 Motorhomes (1965-1976): A Detailed Analysis

The Maxpeedingrods 8VSIF1 exhaust manifold is a popular aftermarket option for Ford F100, F150, F250, and F350 motorhomes manufactured between 1965 and 1976. This exhaust manifold is designed to replace the stock exhaust manifold and improve engine performance. In this analysis, we will discuss the pros and cons of investing in this aftermarket part.

1. Enhanced Engine Performance: The Maxpeedingrods 8VSIF1 exhaust manifold is designed to improve the engine's breathing capacity, leading to better performance. It allows for a more efficient exhaust gas flow, which can result in increased horsepower and torque.

2. Durability: This aftermarket exhaust manifold is made from high-quality materials, including stainless steel, ensuring long-term durability. It can withstand the rigors of regular use, making it an excellent investment for those who plan to use their motorhomes extensively.

3. Easy Installation: The Maxpeedingrods 8VSIF1 exhaust manifold is designed to fit Ford F100, F150, F250, and F350 motorhomes from 1965 to 1976 with minimal modifications. This makes the installation process easier and more accessible to DIY enthusiasts.

4. Improved Fuel Economy: By improving the engine's efficiency, the Maxpeedingrods 8VSIF1 exhaust manifold can help improve fuel economy. This is a significant advantage for those who travel long distances in their motorhomes.

1. Cost: The Maxpeedingrods 8VSIF1 exhaust manifold is more expensive than the stock exhaust manifold. This may be a deterrent for some buyers who are looking for a more cost-effective solution.

2. Loud Exhaust: Some users have reported that the Maxpeedingrods 8VSIF1 exhaust manifold produces a louder exhaust note than the stock manifold. This may be a concern for those who prefer a quieter motorhome.

3. Possible Leaks: As with any aftermarket part, there is a risk of leaks developing over time. Proper installation and maintenance can help minimize this risk, but it is essential to be aware of it.

The Maxpeedingrods 8VSIF1 exhaust manifold is an excellent investment for those who are looking to improve the performance, efficiency, and durability of their Ford F100, F150, F250, or F350 motorhome's engine. However, it comes with a higher price tag and the potential for louder exhaust noise. Ultimately, the decision to invest in this aftermarket part depends on your individual priorities and preferences.

If you are looking to significantly improve the performance and efficiency of your Ford F100, F150, F250, or F350 motorhome's engine and are willing to invest in a higher-priced aftermarket part, the Maxpeedingrods 8VSIF1 exhaust manifold is an excellent choice. However, if cost is a concern or you prefer a quieter exhaust note, you may want to consider other options or wait for a sale on this part.

part # 8vsfi1 prices

• $154.00-$162.28

specifications maniheader:

• for models: F100, F150, F250, F350, Motorhome, 450
• for makes: Ford
• for years: 1965-1976
• brand: Maxpeedingrods
• california prop 65 warning: California Prop 65 Warning
• color: Gray
• country of origin: China
• engine: 5.8l/5.9l/6.4l
• features: Left Right Exhaust
• fitment: For Ford Truck Pickup F100 F150 F250 F350
• fuel type: Gasoline
• items included: Gasket, Mounting Hardware, Stud
• manufacturer part number: 8VSFI1
• manufacturer warranty: 1 Year
• material: Cast Iron
• mounting style: Bolt-on
• oe/oem part number: 674-241, 674241, C8tz9431b, 674-240, 674240, D0tz9430a
• performance part: Yes
• placement on vehicle: Left, Right
• substrate material: Iron
• type: Exhaust Manifold
• universal fitment: No

returns maniheader:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

general maniheader:

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

payments maniheader:

• wallet: Apple-pay
• credit card: Diners-club
• other

shipping maniheader:

• carrier: UPS
• class: Standard
• cost: $0.00
• service: UPS Ground
• type: Fixed
• transit: 2-7 Days

offer maniheader:

• best offers: True
• availability: In Stock
• started: May 19, 2026
• sold: 0
• options: Ship-to-home

seller maniheader:

• rating: 99.7%
• # reviews: 48806

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