SPEEDWAY MOTORS 656498 Port Header Flanges Block 3/8

( Brand: Speedway Motors ), ( Type: Exhaust Flanges ), ( Material: Steel ), ( Manufacturer Part Number: 656498 ), ( Finish: Natural ), ( Item Height: 0.600 ), ( Item Length: 18.40 ), ( Item Width: 2.100 ), ( California Prop 65 Warning: True )

Review SPEEDWAY MOTORS Oval Port Header Flanges 3/8 Inch Thick Chevy Small Block

Introducing the Speedway Motors 656498 Port Header Flanges, a must-have component for any Chevy engine building project. These flanges are specifically designed to fit a 3/8 Chevy block and are engineered to provide a secure and reliable connection for your header system.

Each flange is meticulously crafted from high-quality steel material, ensuring both durability and longevity. The 3/8 thread size is a standard for Chevy engines, making these flanges a versatile addition to your engine build.

These port header flanges are designed to accommodate the use of headers with a 1.75-inch (44.45mm) diameter. The flanges feature a smooth, even surface finish that ensures a perfect seal with your cylinder head gasket. This results in minimal leakage and optimal engine performance.

The Speedway Motors 656498 Port Header Flanges come with bolt holes that are threaded for 12-point, 1.25-inch (31.75mm) bolts. This ensures a snug fit and secure connection between the flanges and the cylinder head. The bolts are not included in the package, but are readily available from most automotive parts suppliers.

Installation of these flanges is a straightforward process. Simply remove the old flanges from your engine block, clean the surfaces, and apply a coat of high-temperature sealant to the mating surfaces. Slide the new flanges into place, and secure them with the appropriate bolts.

In conclusion, the Speedway Motors 656498 Port Header Flanges are an essential addition to any Chevy engine build. Their high-quality steel construction, compatibility with standard 3/8 Chevy blocks, and secure 12-point bolt connection make them a reliable and effective solution for connecting your header system to your engine. Upgrade your engine performance with these expertly crafted port header flanges from Speedway Motors.

Pros and Cons of Buying Speedway 656498 Port Header Flanges for a 3/8 Chevy Block

- High-Quality Material: These header flanges are made of 304 stainless steel, ensuring durability and resistance to corrosion.

- Precise Fit: The flanges are designed to fit perfectly on 3/8 Chevy blocks, reducing the need for extensive modification.

- Improved Performance: Port header flanges help to improve engine performance by allowing for better exhaust flow.

- Easy Installation: The flanges come with gasket seals, making the installation process relatively straightforward.

- Cost: The Speedway 656498 port header flanges may be more expensive compared to some aftermarket alternatives.

- Requires Welding: If you're not comfortable with welding, you may need to hire a professional to install the header flanges, adding to the overall cost.

- Limited Compatibility: These header flanges are specifically designed for 3/8 Chevy blocks, so they may not be suitable for other engine types.

The Speedway 656498 port header flanges offer several benefits, such as improved performance, precise fit, and high-quality materials. However, their cost and the requirement for welding during installation may deter some buyers. Ultimately, if you're looking for a durable and effective solution to enhance your engine's performance, these header flanges could be a worthwhile investment, especially if you have the necessary skills and tools for installation.

If you're confident in your installation abilities, the Speedway 656498 port header flanges are a solid choice for improving your 3/8 Chevy block's performance. However, if you're hesitant about the cost or the need for welding, you may want to explore alternative options or seek professional advice before making a decision.

part # 656498 prices

• $27.99-$41.99

specifications clampcluch:

• for makes: Chevy
• brand: Speedway Motors
• type: Exhaust Flanges
• material: Steel
• manufacturer part number: 656498
• finish: Natural
• item height: 0.600
• item length: 18.40
• item width: 2.100
• california prop 65 warning: True

offer clampcluch:

• quantity: 1
• availability: In Stock
• started: February 17, 2026
• options: Ship-to-home
• sold: 0

payments clampcluch:

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

general clampcluch:

• Car Truck Parts Accessories > Exhaust Emission Systems > Clamps, Flanges, Hangers Hardware
• condition: New

returns clampcluch:

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

shipping clampcluch:

• cost: $0.00
• carrier: FedEx, UPS
• class: Economy, Expedited
• service: FedEx Ground Economy, UPS 2nd Day Air
• type: Fixed
• transit: 3-7 Days

seller clampcluch:

• rating: 99.7%
• # reviews: 319313

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