16590-AL500: HEAT SHIELD EXHAUST MANIFOLD HEADER, Nissan

16590-AL500 Comparison

16590-AL500 in Used Condition
photo	price	summary	rating
Details	$29.87	Condition is Used, 2003-06 Nissan 350Z Infiniti G35 VQ35DE Exhaust Manifold Header Heat Shields OEM, FREE SHIPPING	100.0%
Details	$39.95	Condition is Used, 03-06 Nissan 350Z G35 Passenger Exhaust Manifold Heat Shield 16590AL500 OEM Kyf, FREE SHIPPING	99.8%
Details	$29.48	Top Pick! Condition is Used, 03-06 Infiniti G35 Nissan 350Z Right Exhaust Manifold Heat Shield 16590-AL500, shipping cost = $20.00	99.9%
Details	$34.30	Top Pick! Condition is Used, 03-06 Infiniti G35 Nissan 350Z Bank 1 Right Exhaust Manifold Shield 16590-AL500, shipping cost = $20.00	99.9%
Details	$38.50	Top Pick! Condition is Used, 03-07 Infiniti G35 Nissan 350Z VQ35DE Bank 1 Exhaust Heat Shield 16590-AL500, shipping cost = $20.00	99.9%
Details	$37.04	Condition is Used, 03-07 Nissan 350z Infiniti G35 Right Exhaust Manifold Header Cover 16590-AL500, shipping cost = $25.00	99.9%
Details	$40.00	Condition is Used, 03-07 Infiniti Nissan VQ V6 Right Side Exhaust Manifold Heat Shield 16590-AL500, shipping cost = $25.00	100.0%
Details	$42.52	Condition is Used, 03-07 Infiniti Nissan G35 350Z Right RH Exhaust Manifold Heat Shield 16590-AL500, shipping cost = $25.00	99.9%
Details	$43.76	Condition is Used, 03-06 Nissan 350z Infiniti G35 Left Right Manifold Cover 16590-AL500 16590-AL510, shipping cost = $25.00	99.9%
Details	$51.98	Condition is Used, 03-07 Infiniti Nissan G35 350Z Right RH Exhaust Manifold Heat Shield 16590-AL500, shipping cost = $25.00	99.9%
Details	$51.98	Condition is Used, 03-07 Infiniti Nissan G35 350Z Right RH Exhaust Manifold Heat Shield 16590-AL500, shipping cost = $25.00	99.9%
Details	$52.70	Condition is Used, 03-06 Infiniti G35 M35 VQ35DE Left Right Manifold Cover 16590-AL500 16590-AL510, shipping cost = $25.00	99.9%

16590-AL500 NISSAN Exhaust Manifold Header Heat 350Z G35

The Nissan Infiniti 16590-AL500 exhaust manifold header is an essential component of the VQ35DE engine found in various Nissan and Infiniti models, including the 350Z and G35, produced between 2003 and 2006. This exhaust manifold is responsible for collecting exhaust gases from the cylinder head and directing them towards the catalytic converter and the exhaust system.

This high-performance exhaust manifold is made of aluminum, which is lighter than traditional cast iron manifolds. This reduction in weight contributes to improved engine response and acceleration, making it an excellent choice for enthusiasts seeking to enhance the performance of their vehicles.

The Nissan Infiniti 16590-AL500 exhaust manifold header features a unique design that maximizes gas flow and reduces back pressure. The manifold's compact size also makes it an ideal choice for those looking to install high-performance exhaust systems or catalytic converters with smaller dimensions.

Each exhaust manifold header is meticulously engineered and manufactured to meet OEM specifications. The gaskets and seals used are designed to provide a tight seal between the manifold and the cylinder head, ensuring optimal engine performance and minimizing exhaust leaks.

Installing this exhaust manifold header is a straightforward process, but it is essential to follow proper installation procedures to ensure the safety and effectiveness of the component. Properly torquing the bolts and gaskets, as well as using the correct sealing materials, is crucial to achieving optimal performance and longevity.

In summary, the Nissan Infiniti 16590-AL500 exhaust manifold header is an essential performance upgrade for VQ35DE engine-equipped vehicles, including the 350Z and G35. Its lightweight aluminum construction, optimized gas flow design, and OEM-specification manufacturing make it a top choice for enthusiasts looking to enhance their engine's response and acceleration.

Pros and Cons of Buying a Nissan Infiniti 16590-AL500 2003-06 350Z G35 VQ35DE Exhaust Manifold Header

Introduction:

The Nissan Infiniti 16590-AL500 exhaust manifold header is a popular aftermarket upgrade for the VQ35DE engine found in the 2003-06 350Z and G35 models. This component is responsible for connecting the engine cylinders to the exhaust system. Here are some potential advantages and disadvantages of purchasing this exhaust manifold header.

Pros:

1. Enhanced Performance: The aftermarket exhaust manifold header can improve engine performance by reducing exhaust gas flow restrictions. This can lead to increased power output and improved throttle response.

2. Durability: OEM exhaust manifold headers are prone to failure due to their thin walls and cast iron construction. Aftermarket headers, like the Nissan Infiniti 16590-AL500, are typically made of stronger materials, such as stainless steel, and feature thicker walls for improved durability.

3. Improved Engine Sound: A new exhaust manifold header can also result in a more pleasing engine sound, as it allows exhaust gases to flow more freely and can reduce backpressure.

Cons:

1. Cost: Aftermarket exhaust manifold headers can be expensive, especially when compared to the cost of the OEM part. The Nissan Infiniti 16590-AL500, for example, can cost several hundred dollars.

2. Installation Complexity: Installing an aftermarket exhaust manifold header can be a complex process, particularly for those without experience in engine work. This may require the assistance of a professional mechanic, which can add to the overall cost.

3. Potential for Increased Emissions: Some aftermarket exhaust manifold headers may not meet emissions standards, which could result in failed inspections or fines in certain jurisdictions. Always ensure that any aftermarket parts you purchase are compatible with local emissions regulations.

Conclusion:

The Nissan Infiniti 16590-AL500 exhaust manifold header offers various benefits, such as improved performance, durability, and engine sound. However, it comes with potential drawbacks, including cost, installation complexity, and potential emissions issues. Ultimately, the decision to purchase this part depends on your specific needs, budget, and technical abilities.

Recommendation:

If you are an experienced DIY mechanic and are looking for a significant performance improvement, the Nissan Infiniti 16590-AL500 exhaust manifold header could be a worthwhile investment. Ensure that you have a clear understanding of the installation process and any applicable local emissions regulations before making a purchase. Alternatively, if you are not comfortable with engine work or have a limited budget, it may be more practical to stick with the OEM exhaust manifold header.

Details:

Items were lightly media blasted to remove surface rust. Removed from a 2004 Infiniti G35 VQ35DE. Factory original oem parts. Includes mounting hardware bolts.

Please see photos for full condition details. 2003 -06 Nissan 350Z Infiniti G35 VQ35DE exhaust manifold header heat shields oem.

specifications heatnshield:

for models: 350z, G35, Vq35de
for makes: Infiniti
for years: 2003–2006
brand: Nissan
mpn: 16590-al500
country of origin: Japan
items included: Shield
color: Silver
material: Aluminum
placement on vehicle: Engine Compartment, Front, Left, Right, Upper
fuel type: Gasoline
type: Heat Shield
features: Heat-resistant
universal fitment: No

seller heatnshield:

# reviews: 813
rating: 99.8%
city: cedar falls, iowa

general heatnshield:

category: Auto Parts > Car Truck Accessories > Exhaust Emission Systems > Heat Shields, Wraps Sleeves

offer heatnshield:

sold #: 14
prices: $29.48–$52.70
item condition: Used
started: january 16, 2026
availability: in stock
options: ship-to-home
in stock #: 5

returns heatnshield:

policy: returns accepted
paid by: buyer
time: 30 days

shipping heatnshield:

type: fixed
service: usps ground advantage
class: standard
transit: 5-8 days
carrier: usps

payments heatnshield:

wallet: apple-pay
credit card: mastercard
other

rating: 99.8% out of 100 based on 813 user ratings.