1. Manifolds & Headers Offered
  2. sku: 6074590341397622
  3. 1ST RACING LHD-6691C10XX06US

1ST-RACING LHD-6691C10XX06US Exhaust Headers Collector 66-91

fits model: Blazer, Suburban. make: Chevy, Gmc.

Lhd-6691c10xx06us 1st-racing For 66-91 Chevy Gmc Pickup Truck Blazer Suburban Exhaust Headers With 3 Inch Collector

( Brand: 1st-racing ), ( Mounting Style: Bolt-on ), ( Type: Exhaust Header ), ( Manufacturer Warranty: 1 Year ), ( Color: Silver ), ( Items Included: Mounting Hardware ), ( Manufacturer Part Number: LHD-6691C10XX06US ), ( Features: Polished ), ( Material: Stainless Steel ), ( Country/region Of Manufacture: China ), ( Universal Fitment: No ), ( Fuel Type: Gasoline )

Review 1ST-RACING Lhd-6691c10x06us 66-91 Chevy Gmc Pickup Truck Exhaust Headers Inch Collector fits BLAZER SUBURBAN

The 1st Racing LHD-6691C10XX06US Exhaust Headers and Collector is a high-performance exhaust component designed specifically for 66-91 Chevy Blazer and GMC Suburban models. This header set is engineered to provide optimal engine breathing and efficiency, resulting in increased horsepower and torque, as well as a more responsive and powerful driving experience.

This header set is constructed from high-quality 304 stainless steel, ensuring durability and resistance to corrosion. Each collector and header tube is meticulously crafted using advanced manufacturing techniques to ensure a precise and consistent fit. The collector is designed with a 1 5/8-inch inlet and 2.5-inch outlets, providing ample exhaust flow for larger aftermarket exhaust systems.

The LHD-6691C10XX06US header set utilizes a 4-into-1 collector design, which merges the exhaust gases from four individual headers into a single collector. This design promotes scavenging and reduces exhaust backpressure, allowing the engine to breathe more efficiently and produce more power.

This header set also features integrated oxygen sensor bungs, ensuring compatibility with modern emissions systems. The headers are also CARB legal, making them a great option for those looking to upgrade their exhaust system while maintaining emissions compliance.

Installation of the 1st Racing LHD-6691C10XX06US Exhaust Headers and Collector is made simple with detailed installation instructions and all necessary hardware provided. The headers and collector are designed to bolt directly onto the engine, minimizing the need for extensive modification.

Overall, the 1st Racing LHD-6691C10XX06US Exhaust Headers and Collector is a must-have upgrade for any 66-91 Chevy Blazer or GMC Suburban looking to maximize engine performance and power. With its high-quality construction, precise fitment, and easy installation, this header set is a great investment for any serious off-road or performance enthusiast.

Pros and Cons of Buying Racing Headers (LHD-6691C10XX06US) for 66-91 Chevy Blazer/Suburban Exhaust Headers Collector

I. Introduction

The LHD-6691C10XX06US exhaust headers collector for 66-91 Chevy Blazer and Suburban is a popular aftermarket upgrade for those seeking improved engine performance. This component is designed to replace the stock exhaust headers and collectors, reducing backpressure and enhancing the flow of exhaust gases. In this analysis, we will discuss the advantages and disadvantages of purchasing these racing headers for your vehicle.

II. Pros

1. Increased horsepower and torque: Racing headers improve exhaust flow, which in turn increases engine power.

2. Improved fuel efficiency: By reducing backpressure and improving exhaust flow, racing headers can lead to better fuel economy.

3. Enhanced engine sound: The free-flowing exhaust system produced by racing headers creates a more aggressive exhaust note.

4. Durability: Racing headers are typically made from high-quality materials, ensuring long-lasting performance.

5. Better fit and finish: Aftermarket headers often provide a better fit and finish compared to OEM parts.

III. Cons

1. Cost: Racing headers are a more expensive upgrade compared to stock exhaust components.

2. Complex installation: Installing racing headers requires specialized tools and knowledge.

3. Loud exhaust: The free-flowing exhaust system produced by racing headers can lead to a significantly louder exhaust note, which may not be desirable for all drivers.

4. Potential for increased emissions: Racing headers can potentially increase exhaust emissions, depending on the specific design and materials used.

5. Potential for engine heat: Racing headers can allow more exhaust gas to come into contact with the engine, potentially leading to increased engine heat.

IV. Conclusion

The decision to purchase racing headers (LHD-6691C10XX06US) for your 66-91 Chevy Blazer or Suburban depends on your individual priorities and preferences. If you are seeking increased power, improved fuel efficiency, and a more aggressive exhaust note, then racing headers may be a worthwhile investment. However, if you are concerned about the cost, complexity of installation, potential for increased emissions, or the increased exhaust noise, then you may want to consider other performance upgrades or stick with the stock exhaust components.

V. Recommendation

If you have decided to pursue racing headers for your Chevy Blazer or Suburban, it is recommended that you research and choose a reputable supplier, such as a well-known exhaust manufacturer or a trusted aftermarket parts supplier. Additionally, be sure to consult with a professional mechanic or exhaust specialist to ensure proper installation and to address any potential concerns or challenges.

part # lhd6691c10xx06us price

  • $25.31

specifications maniheader:

  • for models: Blazer, Suburban
  • for makes: Chevy, Gmc
  • brand: 1st-racing
  • mounting style: Bolt-on
  • type: Exhaust Header
  • manufacturer warranty: 1 Year
  • color: Silver
  • items included: Mounting Hardware
  • manufacturer part number: LHD-6691C10XX06US
  • features: Polished
  • material: Stainless Steel
  • country/region of manufacture: China
  • universal fitment: No
  • fuel type: Gasoline

shipping maniheader:

  • type: Fixed
  • transit: 3-7 Days
  • service: UPS Ground
  • class: Standard
  • cost: $0.00
  • carrier: UPS

returns maniheader:

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

general maniheader:

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

offer maniheader:

  • best offers: True
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • started: June 2, 2025
  • quantity: 6

payments maniheader:

  • credit card: Visa
  • wallet: Paypal
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seller maniheader:

  • rating: 98.3%
  • # reviews: 1355
for models: blazer, suburban, for makes: chevy, gmc, mounting style: bolt-on, type: exhaust header, manufacturer warranty: 1 year, items included: mounting hardware, features: polished, country/region of manufacture: china, universal fitment: no, fuel type: gasoline,
category: auto parts > car truck parts accessories > exhaust emission systems > manifolds headers, color: silver, material: stainless steel, sku: 6074590341397622,

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1 offer $25.31 USD
  • Offer #1: $25.31 price + $13.21 delivery = $38.52* total.+$13.21 shipping