1. Manifolds & Headers Offered
  2. sku: 11926372586613722
  3. DOUG THORLEY THY-564Y-LSC

DOUG THORLEY THY-564Y-LSC Tube Headers THY-564Y-LS-C 4RUNNER/GX470 LEXUS4.7

fits model: Gx470, 4runner. make: Toyota. year: 2003–2004.

Thy-564y-ls-c Doug Thorley Thy-564y-lsc Long Tube Headers 03-04 Toyota 4runner/gx470 Lexus4.7

( Brand: Doug Thorley ), ( Part Type: Tube Header ), ( Items Included: Gasket, 02 Extensions ), ( Manufacturer Part Number: THY-564Y-LSC ), ( Material: Stainless Steel ), ( Placement On Vehicle: Front ), ( California Prop 65 Warning: Cancer And Reproductive Harm )

Review DOUG THORLEY Long Tube Headers Toyota 4runner/gx470 fits 4RUNNER GX470 2003–2004

Introducing the Doug Thorley THY-564Y-LSC and THY-564Y-LS-C tube headers for select Toyota 4Runner (03-04), GX470, and Lexus GX470 models, engineered to deliver improved performance and durability for your vehicle. These tube headers are designed specifically for the 4.7L V8 engine and are manufactured using high-quality stainless steel, ensuring they withstand the test of time and the rigors of off-road use.

The THY-564Y-LSC and THY-564Y-LS-C tube headers feature a 1 5/8-inch primary tube diameter, which optimizes exhaust flow and scavenging for enhanced power output. The headers are equipped with 3/8-inch thick, 304L stainless steel flanges that provide a secure connection to the engine and exhaust system. Moreover, they come with stud gaskets and nuts, ensuring a leak-free installation.

These headers also include a built-in equal length design, which provides more uniform exhaust flow, leading to better cylinder scavenging and improved engine efficiency. Additionally, they feature a 4-into-1 collector design, which reduces the number of joints in the exhaust system, thereby minimizing exhaust gas flow loss and increasing power.

The Doug Thorley THY-564Y-LSC and THY-564Y-LS-C tube headers are designed for easy installation. They come with all necessary hardware, including bolts, nuts, and washers. Moreover, they are shipped in a protective coating to ensure they arrive at your door in pristine condition.

In summary, the Doug Thorley THY-564Y-LSC and THY-564Y-LS-C tube headers are an excellent choice for Toyota 4Runner, GX470, and Lexus GX470 owners looking to enhance their vehicle's performance and durability. By optimizing exhaust flow, reducing joints, and utilizing high-quality materials, these headers deliver improved power output, enhanced engine efficiency, and unmatched reliability.

Pros and Cons of Buying Doug Thorley THY-564Y-LSC/THY-564Y-LS-C Tube Headers for 03-04 Toyota 4Runner/GX470 & Lexus 4.7

Introduction:

The Doug Thorley THY-564Y-LSC and THY-564Y-LS-C tube headers are aftermarket solutions designed for the 4.7L V8 engines found in various Toyota and Lexus models, including the 03-04 Toyota 4Runner and GX470. These headers offer performance benefits and are popular among enthusiasts. In this article, we will discuss the pros and cons of investing in these headers.

Pros:

1. Performance: Doug Thorley headers are known for their high-performance capabilities. They improve airflow by reducing the length and weight of the stock exhaust system, allowing for better engine breathing and increased horsepower.

2. Durability: The headers are made from heavy-duty stainless steel, ensuring they can withstand the rigors of off-road use and daily driving.

3. Fitment: The THY-564Y-LSC and THY-564Y-LS-C headers are specifically designed for the 4.7L V8 engines mentioned above. Proper fitment is crucial for optimal performance and ensuring a smooth installation process.

4. Improved Sound: The headers produce a more aggressive exhaust note, which is a desirable trait for many enthusiasts.

5. Longevity: Stainless steel construction ensures the headers will last longer than the stock components, saving you money in the long run.

Cons:

1. Cost: The Doug Thorley headers are more expensive than the stock exhaust system. Enthusiasts must consider if the performance benefits outweigh the additional cost.

2. Installation Complexity: Installing the headers requires some mechanical skills and experience. Professional installation may be necessary for those who are not confident in their abilities.

3. Emissions: The headers may not meet emissions requirements in certain areas, which could lead to fines or other legal issues.

4. Potential for Backfiring: The headers can cause occasional backfiring, which can be a concern for some users. This is not a common issue but can occur due to the improved airflow and different exhaust flow dynamics.

Conclusion:

The Doug Thorley THY-564Y-LSC and THY-564Y-LS-C tube headers offer significant performance benefits for those looking to enhance their 03-04 Toyota 4Runner/GX470 or Lexus 4.7 engine. While they come with a higher cost and installation complexity, the improvements in power, sound, and durability make them a worthwhile investment for many enthusiasts. However, it is essential to consider local emissions regulations and potential backfiring issues before making a purchase.

Recommendation:

If you are an enthusiast looking to boost the performance of your 4.7L V8 engine and are willing to invest in high-quality aftermarket parts, the Doug Thorley THY-564Y-LSC and THY-564Y-LS-C tube headers are an excellent choice. However, it is crucial to ensure proper installation and consider any local emissions regulations before making a purchase. For those who lack the necessary mechanical skills, seeking professional installation is recommended.

specifications maniheader:

  • for models: Gx470, 4runner
  • for makes: Toyota
  • for years: 2003-2004
  • brand: Doug Thorley
  • part type: Tube Header
  • items included: Gasket, 02 Extensions
  • manufacturer part number: THY-564Y-LSC
  • material: Stainless Steel
  • placement on vehicle: Front
  • california prop 65 warning: Cancer And Reproductive Harm

payments maniheader:

  • wallet: Paypal
  • other
  • credit card: Discover

seller maniheader:

  • # reviews: 112
  • rating: 100.0%

shipping maniheader:

  • class: Standard
  • cost: $33.98
  • carrier: UPS
  • type: Calculated
  • transit: 5-11 Days
  • service: UPS Ground

general maniheader:

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

returns maniheader:

  • policy: No Returns

offer maniheader:

  • started: April 25, 2026
  • quantity: 1
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • best offers: True
for models: gx470, 4runner, for makes: toyota, for years: 2003-2004, part type: tube header, items included: gasket, 02 extensions, placement on vehicle: front, california prop 65 warning: cancer and reproductive harm,
category: auto parts > car truck parts accessories > exhaust emission systems > manifolds headers, material: stainless steel, sku: 11926372586613722,

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