1. Manifolds & Headers Offered
  2. sku: 12406996310043813
  3. JEGS 31803

JEGS 31803 Gm Header Flange 889944042198

31803 Jegs Gm Header Flange

( Brand: Jegs ), ( Part Type: Header Flange ), ( Manufacturer Part Number: 31803 ), ( Country Of Origin: Usa ), ( UPC: 889944042198 )

Review JEGS Gm Header Flange

Introducing the 31803 GM Header Flange, a vital component in the exhaust system of select General Motors vehicles. This flange is meticulously engineered to provide a secure and efficient connection between the catalytic converter and the exhaust manifold.

The 31803 GM Header Flange is manufactured from high-strength steel, ensuring durability and resistance to corrosion. Its robust design allows it to withstand the extreme temperatures and pressure fluctuations within the exhaust system. This flange is specifically designed for use with GM engines, ensuring a perfect fit and seamless integration with the existing exhaust components.

Measuring approximately 10.2 inches in length, 5.5 inches in width, and 2 inches in height, this flange is a crucial part in the proper functioning of the exhaust system. Its smooth, polished finish not only adds to the aesthetic appeal of the engine bay but also facilitates the easy flow of exhaust gases.

The 31803 GM Header Flange comes with pre-drilled holes for easy installation. The flange's gasket surface is engineered to provide a tight seal, preventing exhaust leaks and ensuring optimal performance. The flange's bolts and nuts are included in the package, making it a complete, ready-to-install solution.

In conclusion, the 31803 GM Header Flange is a must-have component for those looking to maintain or upgrade their exhaust system on select General Motors vehicles. Its high-quality construction, precise fit, and ease of installation make it an invaluable addition to any engine bay.

Buying a 31803 GM header flange involves weighing the potential benefits against the possible drawbacks. Here are some pros and cons to consider: Pros:

1. Improved Engine Performance: A new header flange can enhance the overall performance of your engine by improving the exhaust flow and reducing backpressure.

2. Durability: A high-quality header flange is built to last and can withstand the harsh conditions of regular use.

3. Better Fit: A new header flange may provide a better fit than an older or used one, reducing the risk of leaks or other issues.

Cons:

1. Cost: A new header flange can be a significant investment, especially for those on a budget.

2. Installation Complexity: Installing a new header flange can be a challenging task, requiring specialized tools and knowledge.

3. Potential for Damage: During installation, there is a risk of damaging other engine components or the header flange itself.

Conclusion:

Buying a new 31803 GM header flange can result in improved engine performance and durability, but it comes with a significant cost and installation complexity. If you are experiencing issues with your current header flange, or if you are looking to maximize your engine's performance, then the benefits may outweigh the drawbacks. However, if you are on a tight budget or are not comfortable with the installation process, then it may be worth considering other options.

Recommendation:

If you have the budget and the necessary installation expertise, then a new 31803 GM header flange can be a worthwhile investment for enhancing your engine's performance. However, if you are unsure about the installation process or if you are on a tight budget, then it may be worth considering a used or reconditioned header flange or exploring other performance modifications that may be more cost-effective. Ultimately, the decision should be based on your individual circumstances and priorities.

part # 31803 prices

  • $58.49-$69.99

specifications maniheader:

  • brand: Jegs
  • part type: Header Flange
  • manufacturer part number: 31803
  • country of origin: Usa
  • upc: 889944042198

offer maniheader:

  • quantity: 10
  • started: May 21, 2026
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock

returns maniheader:

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

seller maniheader:

  • rating: 99.5%
  • # reviews: 631165

general maniheader:

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

shipping maniheader:

  • type: Fixed
  • transit: 2-7 Days
  • cost: $15.99
  • class: Standard
  • service: Standard

payments maniheader:

  • other
  • wallet: Google-pay
  • credit card: Visa
part type: header flange, country of origin: usa,
category: auto parts > car truck parts accessories > exhaust emission systems > manifolds headers, sku: 12406996310043813,

Jegs 31803 Is Similar To:

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2 offers $58.49–$69.99 USD
  • Offer #1: $69.99 price + $15.99 delivery = $85.98* total. Thick Steel Flanges, Sold Individually JEGS Header Flange for GM LS1/LS2/LS3/LS6 Round Port . Header Flange, GM LS1/LS2/LS3/LS6, 2 in.+$15.99 shipping
  • Offer #2: $58.49 price + free delivery = $58.49* total.FREE SHIPPING