( Brand: 1st-racing ), ( Type: Exhaust Manifold ), ( Manufacturer Warranty: 1 Year ), ( Color: Silver ), ( Items Included: Mounting Hardware ), ( Manufacturer Part Number: EM-CH9906HK789 ), ( Features: Polished ), ( Material: Stainless Steel ), ( Universal Fitment: No ), ( Country Of Origin: China ), ( Placement On Vehicle: Front ), ( Fuel Type: Gasoline )
Review 1ST-RACING Exhaust Headers Chevrolet Silverado/gmc 4.8l 5.3l fits SILVERADO SIERRA 1500 2500 1999–2006
Introducing the 1st-Racing EM-CH9906HK789 Exhaust Headers, a high-performance upgrade for your 1999-2006 Chevrolet Silverado or GMC Sierra 1500 and 2500 models equipped with the 4.8L or 5.3L engine. These headers are meticulously designed and engineered to deliver enhanced power, improved exhaust flow, and a more appealing sound.
The EM-CH9906HK789 headers feature a 1.625-inch primary tube diameter, which is larger than the stock headers, enabling a freer exhaust flow. This improvement results in better engine breathing and increased horsepower. Moreover, the headers are constructed from 321 stainless steel, ensuring durability and resistance to corrosion.
Each header comes with fully welded collectors, which provide a stronger and more leak-free connection compared to the stock headers' bolted-on collectors. The collectors have a 3-inch diameter, which matches the size of the aftermarket exhaust systems used by many performance enthusiasts.
The EM-CH9906HK789 headers also include 3/8-inch thick exhaust flanges that offer a perfect seal with your exhaust system, minimizing the risk of exhaust leaks. Additionally, the headers have integrated oxygen sensor bungs, ensuring that your vehicle's onboard diagnostic system continues to function correctly.
Installing these headers is a straightforward process, thanks to their bolt-on design. They replace the stock headers without requiring any significant modifications to the engine bay or exhaust system. However, it is essential to note that using these headers may require the use of a high-performance exhaust system designed to accommodate their larger primary tubes and collectors.
By upgrading your vehicle with the 1st-Racing EM-CH9906HK789 Exhaust Headers, you can expect an increase in power and torque, a more responsive engine, and an improved exhaust note. These headers are an excellent choice for anyone seeking a performance upgrade for their Chevrolet Silverado or GMC Sierra 1500 or 2500 with a 4.8L or 5.3L engine.
Buying aftermarket exhaust headers, such as the CH9906HK789 model from Racing Emissions for your 1999-2006 Chevrolet Silverado/GMC Sierra 1500 2500 with 4.8L or 5.3L engines, comes with several pros and cons that can significantly impact your decision.
Pros:1. Power Gain: Aftermarket headers are designed to improve the flow of exhaust gases, which can lead to increased horsepower and torque.
2. Increased Efficiency: By reducing exhaust backpressure, headers can improve engine efficiency and fuel economy.
3. Enhanced Sound: The new headers can provide a more pleasing exhaust note, which is often preferred by enthusiasts.
Cons:1. Cost: Aftermarket headers can be quite expensive, ranging from several hundred to over a thousand dollars, depending on the brand and quality.
2. Installation Complexity: Installing headers requires extensive mechanical knowledge and experience. It is not a DIY job for most people.
3. Potential for Check Engine Light: Installing headers can sometimes trigger the check engine light due to the need for oxygen sensors or other modifications.
4. Loud Exhaust: Depending on the design, headers can produce a louder exhaust, which might not be desirable for those who value a quiet ride.
Ending Conclusion:When deciding whether to buy Racing Emissions CH9906HK789 exhaust headers for your 1999-2006 Chevrolet Silverado/GMC Sierra 1500 2500 with a 4.8L or 5.3L engine, it is crucial to weigh the pros and cons carefully. If you are an enthusiast seeking increased power and a more pleasing exhaust note, the headers could be a worthwhile investment. However, if you value quietness, ease of installation, and a reasonable budget, you might want to consider other modifications or skip the headers altogether.
Recommendation:If you still want to pursue the headers, ensure you have the necessary mechanical knowledge and resources to install them correctly. Alternatively, consider hiring a professional mechanic to perform the installation. Also, make sure to research different brands and models to find the best headers that meet your needs and budget.
part # emch9906hk789 prices
- $25.13-$120.00
specifications maniheader:
- for models: 1500, 2500, Silverado, Sierra
- for makes: Chevrolet, Gmc
- for years: 1999-2006
- brand: 1st-racing
- type: Exhaust Manifold
- manufacturer warranty: 1 Year
- color: Silver
- items included: Mounting Hardware
- manufacturer part number: EM-CH9906HK789
- features: Polished
- material: Stainless Steel
- universal fitment: No
- country of origin: China
- placement on vehicle: Front
- fuel type: Gasoline
seller maniheader:
- rating: 94.7%
- # reviews: 178
shipping maniheader:
- class: Standard
- carrier: UPS
- service: UPS Ground
- cost: $0.00
- transit: 5-9 Days
- type: Fixed
general maniheader:
- Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers
- condition: New
payments maniheader:
- credit card: Diners-club
- wallet: Paypal
- other
returns maniheader:
- time: 30 Days
- paid by: Seller
- policy: Returns Accepted
offer maniheader:
- sold: 0
- availability: In Stock
- started: December 28, 2025
- best offers: True
- options: Ship-to-home
- quantity: 10
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2 offers $25.13–$120.00 USD
- Offer #1: $120.00 price + $33.34 delivery = $153.34* total. This exhaust manifold is a vital component in the car's emission system, helping to regulate and direct the flow of exhaust gases for optimal performance The product is a new old stock OEM exhaust manifold designed specifically for a Ford vehicle.+$33.34 shipping
- Offer #2: $25.13 price + $13.31 delivery = $38.44* total.+$13.31 shipping