1ST-RACING LHD-6691C10 Exhaust Headers Block C15 K15 K20

( Brand: 1st-racing ), ( Mounting Style: Bolt-on ), ( Type: Exhaust Header ), ( Manufacturer Warranty: 1 Year ), ( Color: Silver ), ( Items Included: Gasket ), ( Manufacturer Part Number: LHD-6691C10 ), ( Material: Stainless Steel ), ( Features: Polished ), ( Universal Fitment: No ), ( Fuel Type: Gasoline )

Review 1ST-RACING Exhaust Headers Chevy Gmc C15 K15 K20 Trucks Small Block fits C10 C20 C25 K10 K25

Introducing the 1st-Racing LHD-6691C10 Exhaust Headers, a high-performance upgrade for your Chevy C10, C15, C20, C25, K10, K15, K20, or K25 with a GM block engine. These headers are designed to provide enhanced exhaust flow and improved engine breathing, resulting in increased power and torque.

The LHD-6691C10 headers are made from premium T304 stainless steel, known for its superior strength and resistance to corrosion. Each header is meticulously crafted using advanced CNC technology to ensure precise fitment and superior quality. The headers feature a 1.625-inch primary tube diameter and 1.5-inch collector, providing optimal exhaust flow and scavenging.

The design of the LHD-6691C10 headers includes a long-tube configuration with a 5-bolt flange, allowing for a smooth and uninterrupted exhaust flow from the engine to the catalytic converter. The headers also come with 3/8-inch OD primary oxygen sensors mounting bosses, ensuring compatibility with most OBD-I and OBD-II systems.

One of the standout features of the LHD-6691C10 headers is the included 3/8-inch OD exhaust stud kit, allowing for a direct bolt-on installation without the need for welding or drilling. This makes for a straightforward installation process and reduces the likelihood of any potential complications.

The headers come with a durable high-temperature ceramic coating, which not only provides an attractive appearance but also offers excellent heat insulation and protection from the elements. This coating ensures that the headers can withstand the extreme temperatures generated by the engine, while also reducing under-hood temperatures for improved engine performance and longevity.

By upgrading to the 1st-Racing LHD-6691C10 Exhaust Headers, you can expect to see significant improvements in your vehicle's power, torque, and overall exhaust flow. These headers are an excellent investment for any enthusiast looking to take their Chevy or GMC truck to the next level.

Buying Racing LHD-6691C10 exhaust headers for Chevy/GMC C10, C15, C20, C25, K10, K15, K20, and K25 blocks comes with several pros and cons that are essential to consider before making a purchase.

1. Increased Performance: Exhaust headers improve the performance by reducing backpressure and allowing gases to exit more efficiently from the engine. This results in improved power output and better engine response.

2. Improved Fuel Economy: By reducing the backpressure, the engine can work more efficiently, and as a result, it consumes less fuel, leading to improved fuel economy.

3. Enhanced Sound: Racing headers produce a more resonant and powerful exhaust note, which is a favorite among car enthusiasts.

4. Durability: These headers are designed for high-performance applications and are made of high-quality materials that can withstand extreme temperatures and high RPMs.

5. Compatibility: These headers are compatible with a wide range of Chevy and GMC models, making them a versatile choice for car enthusiasts.

1. Cost: Racing headers can be quite expensive compared to stock exhaust systems. This may be a deterrent for some car enthusiasts who are on a budget.

2. Installation Complexity: Installing headers requires a certain level of mechanical expertise, and it can be a time-consuming process. It may also require the use of specialized tools.

3. Increased Noise: The enhanced sound that comes with racing headers may be too loud for some people, especially those who live in residential areas.

4. Potential for Leaks: Headers are prone to leaks, especially if they are not installed correctly. Leaks can cause damage to the engine and result in decreased performance.

Racing LHD-6691C10 exhaust headers offer several benefits, including increased performance, improved fuel economy, enhanced sound, durability, and compatibility. However, they also come with some drawbacks, such as cost, installation complexity, increased noise, and potential for leaks.

If you are a car enthusiast looking to improve the performance of your Chevy or GMC C10, C15, C20, C25, K10, K15, K20, or K25 block, then racing headers are an excellent investment. However, it is essential to ensure that you have the necessary mechanical expertise to install them correctly and that you are willing to deal with the increased noise and potential for leaks. If you are on a tight budget, then you may want to consider other performance upgrades before investing in headers. Ultimately, the decision to buy racing headers depends on your individual preferences, budget, and mechanical abilities.

part # lhd6691c10 prices

• $25.20-$120.00

specifications maniheader:

• for models: C10, C20, C25, K10, K25
• for makes: Chevy, Gmc
• brand: 1st-racing
• mounting style: Bolt-on
• type: Exhaust Header
• manufacturer warranty: 1 Year
• color: Silver
• items included: Gasket
• manufacturer part number: LHD-6691C10
• material: Stainless Steel
• features: Polished
• universal fitment: No
• fuel type: Gasoline

seller maniheader:

• rating: 99.0%
• # reviews: 563

returns maniheader:

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

payments maniheader:

• credit card: Discover
• wallet: Apple-pay
• other

offer maniheader:

• started: May 26, 2026
• sold: 0
• best offers: True
• availability: In Stock
• options: Ship-to-home

general maniheader:

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

shipping maniheader:

• carrier: UPS
• class: Standard
• transit: 4-9 Days
• cost: $0.00
• type: Fixed
• service: UPS Ground

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