SPEED ENGINEERING 25-1011 Longtube Headers 7/8

( Brand: Speed Engineering ), ( Mounting Style: Bolt-on ), ( Color: Silver ), ( Items Included: Gasket ), ( Manufacturer Part Number: 25-1011 ), ( Material: Stainless Steel ), ( Vintage Part: No ), ( Placement On Vehicle: Front ), ( Fuel Type: Gasoline ), ( Type: Exhaust Header ), ( Features: Polished ), ( Country/region Of Manufacture: China ), ( Performance Part: Yes )

Review SPEED ENGINEERING And 7/8 Inch Longtube Headers fits SILVERADO SIERRA 1999–2006

Introducing our Engineering 25-1011 long tube headers for the 1999-2006 Silverado and Sierra 7.3L Vortec V8 engines. These headers are meticulously designed and manufactured to deliver superior performance and durability.

The Engineering 25-1011 headers are constructed from high-quality 1011 silver alloy steel, ensuring strength and longevity. Each header is CNC-machined to precise specifications to ensure a perfect fit and compatibility with factory exhaust manifolds, gaskets, and catalytic converters.

These long tube headers provide several benefits over stock headers. First, they help to reduce exhaust gas flow restrictions, resulting in improved engine breathing and increased power output. The long tube design helps to minimize exhaust gas turbulence, which can lead to better fuel-air mixture and more complete combustion.

Additionally, these headers feature a 1 5/8-inch primary tube diameter, which maximizes exhaust flow and delivers a more efficient exhaust system. The collector diameter is 3 inches, which provides ample space for efficient exhaust gas flow while also maintaining a compact design.

Each header comes complete with new gaskets and hardware, making installation a straightforward process. The headers also feature rolled edges to prevent exhaust leaks and ensure a secure fit with the exhaust manifolds.

In summary, the Engineering 25-1011 long tube headers for the 1999-2006 Silverado and Sierra 7.3L Vortec V8 engines offer significant performance gains, improved engine breathing, and increased durability. Constructed from high-quality 1011 silver alloy steel and meticulously CNC-machined to precise specifications, these headers are an excellent investment for any serious off-road or performance enthusiast.

Pros and Cons of Installing 25-1011 Silverado/Sierra 7/8 Longtube Headers (1999-2006)

1. Improved Performance: Longtube headers allow for better scavenging of exhaust gases, improving engine efficiency and increasing horsepower and torque.

Pro: Enhanced power delivery and improved engine performance.

2. Enhanced Sound: Longtube headers produce a more aggressive exhaust note due to their larger diameter, longer length, and minimal restriction.

Pro: Improved engine sound and increased exhaust note volume.

3. Durability: 25-1011 Silverado/Sierra longtube headers are made from high-quality materials, ensuring durability and resistance to corrosion.

Pro: Longer lifespan compared to stock headers.

4. Fitment: These headers are designed to fit 1999-2006 Silverado and Sierra models, making the installation process simpler and more straightforward.

Pro: Easy installation and compatibility with specific model years.

5. Potential for Increased MPG: By improving engine efficiency, longtube headers can potentially lead to increased fuel economy.

Pro: Savings on fuel costs over time.

6. Potential for Check Engine Light: Some users have reported issues with the check engine light coming on after installing longtube headers. This can be caused by a variety of factors, including improper installation or vehicle sensors not being compatible with the headers.

Con: Potential for check engine light issues.

7. Cost: Longtube headers can be more expensive than stock headers or aftermarket cat-back exhaust systems, making them a more significant investment.

Con: Higher cost compared to other exhaust upgrades.

8. Installation Complexity: Installing longtube headers requires more time and effort compared to other exhaust upgrades, as they involve more extensive modifications.

Con: Complex installation process.

Longtube headers offer numerous benefits, including improved performance, enhanced exhaust note, durability, and potential fuel savings. However, they come with some drawbacks, such as potential check engine light issues, higher cost, and a more complex installation process. Ultimately, the decision to install longtube headers depends on your priorities, budget, and the specific requirements of your vehicle.

If you are looking for significant power gains, improved engine sound, and increased efficiency, longtube headers are an excellent choice. However, be prepared for a more complex installation process and the potential for check engine light issues. It is recommended to purchase from a reputable manufacturer and follow proper installation procedures to minimize potential complications.

part # 251011 prices

• $110.00-$123.50

specifications maniheader:

• for models: Silverado, Sierra
• for years: 1999-2006
• brand: Speed Engineering
• mounting style: Bolt-on
• color: Silver
• items included: Gasket
• manufacturer part number: 25-1011
• material: Stainless Steel
• vintage part: No
• placement on vehicle: Front
• fuel type: Gasoline
• type: Exhaust Header
• features: Polished
• country/region of manufacture: China
• performance part: Yes

returns maniheader:

• policy: No Returns

payments maniheader:

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

general maniheader:

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

shipping maniheader:

• service: UPS Ground
• type: Calculated
• cost: $28.20
• transit: 2-6 Days
• class: Standard
• carrier: UPS

seller maniheader:

• # reviews: 285
• rating: 100.0%

offer maniheader:

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

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