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  2. sku: 13678688283940731
  3. KAC 4Y6UK56U

KAC 4Y6UK56U Inf Intake Kit Air Filter

fits model: G35, 350z, Fx35. make: Infiniti, Nissan. year: 2003–2006.

4y6uk56u Kac For 03-06 Infiniti G35 Nissan 350z Inf Fx35 Cold Air Intake Kit Red Filter 3 Inch

( Brand: Kac ), ( Manufacturer Part Number: 4Y6UK56U ), ( Package Included: 1x Air Filter, 1x Air Intake Tube, 1x Silicon Hose, 2x Silicon Connecterall Accessories On The Picture Are Included ), ( Filter Color: Red ), ( Pipe Color: Silver ), ( Inlet Diameter: 3.00in ), ( Heat Shield: No ), ( Mounting Hardware Included: Yes ), ( Type: Cold Air Intake Kit ), ( Placement On Vehicle: Front ), ( Surface Finish: Polished ), ( Universal Fitment: Direct Replacement ), ( Material: Aluminum ), ( Manufacturer Warranty: 5 Years )

Review KAC For Infiniti Nissan Inf Cold Air Intake Kit Red Filter Inch fits G35 350Z FX35 2003–2006

Introducing the K&N 4Y-6-KIT-56 Air Intake Kit with Filter (4Y6UK56U) designed specifically for select Infiniti G35, Nissan 350Z, Infiniti FX35 applications from model years 2003 to 2006. This high-performance intake kit is engineered to deliver increased airflow and enhanced engine performance, making it an excellent choice for those seeking to improve the breathing capability of their vehicles.

The K&N 4Y6UK56U Air Intake Kit consists of a replacement mass airflow sensor, a heat shield, a K&N high-flow air filter, and a silicone intake tube. The replacement mass airflow sensor is designed to provide accurate and consistent readings, ensuring optimal fuel delivery and improved engine efficiency. The heat shield effectively insulates the air filter from engine heat, which can help maintain filter efficiency and prolong its lifespan.

The heart of this intake kit is the K&N high-flow air filter, which features an oversized cone shape and a large filter surface area. This design enables the intake kit to capture more air, providing a denser air charge to the engine. The filter itself is made from an oil-free, synthetic cotton material, which is highly effective at trapping dirt, dust, and other contaminants. This material also allows the filter to be easily washed and reused, providing long-term savings and reduced maintenance compared to traditional paper filters.

The intake tube is crafted from durable, heat-resistant silicone, ensuring a perfect fit and providing excellent sealing properties. The tube's smooth interior surface minimizes air turbulence, allowing for unobstructed airflow to the engine.

Installing the K&N 4Y-6-KIT-56 Air Intake Kit is a straightforward process, making it an ideal choice for both professional installers and enthusiasts. The kit includes all necessary hardware for installation, and the high-quality construction and materials ensure a reliable and long-lasting upgrade for your vehicle.

By upgrading your vehicle's air intake system with the K&N 4Y6UK56U Air Intake Kit, you can expect to see improvements in engine performance, increased horsepower and torque, and a more responsive throttle. This kit is an excellent investment for any Infiniti G35, Nissan 350Z, or Infiniti FX35 owner seeking to enhance their driving experience and extract the maximum potential from their vehicle.

K&N 45210 Air Intake Kit for 03-06 Infiniti G35, Nissan 350Z, and Infiniti FX35: A Detailed Analysis

Introduction:

The K&N 45210 Air Intake Kit is designed to fit various Infiniti and Nissan vehicles, including the Infiniti G35, Nissan 350Z, and Infiniti FX35 models from 2003 to 2006. This air intake kit aims to improve engine performance by replacing the stock air filter with a high-flow K&N filter. In this analysis, we will discuss the potential pros and cons of purchasing this product.

Pros:

1. Enhanced Air Flow: The high-flow K&N filter allows for increased airflow into the engine, leading to improved engine performance and potential power gains.

2. Reusable Filter: The K&N filter is washable and reusable, reducing the need for frequent filter replacements, saving money in the long run.

3. Improved Fuel Economy: The increased airflow can potentially lead to improved fuel economy, as the engine operates more efficiently.

4. Enhanced Engine Sound: The K&N air intake kit may provide a more aggressive engine sound due to the increased airflow and the absence of the stock intake system's restrictive design.

Cons:

1. Complex Installation: The K&N air intake kit installation process can be complex and time-consuming, requiring the removal of various components such as the engine bay covers, airbox, and the mass air flow sensor.

2. Potential Check Engine Light: In some cases, the installation of the K&N air intake kit may trigger the check engine light due to the mass air flow sensor's sensitivity to changes in airflow. However, this can usually be resolved by resetting the sensor or using a more sensitive mass air flow sensor.

3. Increased Maintenance: Depending on driving conditions, the K&N filter may require more frequent cleaning compared to the stock air filter.

Conclusion:

The K&N 45210 Air Intake Kit for 03-06 Infiniti G35, Nissan 350Z, and Infiniti FX35 offers several benefits, including enhanced airflow, improved fuel economy, and a more aggressive engine sound. However, the complex installation process and potential check engine light may deter some buyers. Ultimately, the decision to purchase this product depends on your personal preferences, technical abilities, and willingness to invest time and effort into the installation process.

Recommendation:

If you are an experienced DIYer, enjoy working on your vehicle, and are willing to invest time and effort into the installation process, the K&N 45210 Air Intake Kit can be a worthwhile investment for potential power gains, improved fuel economy, and an enhanced engine sound. If you lack experience or time, or if the complex installation process is a deterrent, it may be best to consider other options, such as a pre-installed performance chip or a simpler air filter upgrade.

Details:

For 03-06 INFINITI G35 Nissan 350Z Inf FX35 Cold Air Intake Kit Red Filter 3 Features. Filter Color: Red, Fitment Type: Direct Replacement, Quantity: 1, Mounting Hardware Included: Yes, Material: Aluminum, Package included: 1x Air Filter,1x Intake Tube,1x Silicon Hose,2x ConnecterAll accessories on the picture are included, Pipe Silver, Placement Vehicle: Front, Heat Shield: No, Brand: KAC, Cold Kit, Manufacturer Warranty: 5 Years, Inlet Diameter: 3.00in, Surface Finish: Polished, Universal Fitment: Key Benefits. Constructed from high-quality aluminum with a polished surface finish for enhanced durability and aesthetic appeal. Double-check fitment and ensure there are no air leaks before starting the vehicle.

Equipped with a 3.00in inlet diameter to optimize airflow for improved engine performance. Unleash Peak Performance: Our high-flow intake kit is engineered to maximize your engines airflow, delivering noticeable gains in horsepower and torque. Important Notes. Includes all necessary mounting hardware for a hassle-free setup.

Secure the air filter at designated location and ensure all connections are tight. Remove the factory air intake system following vehicle-specific instructions. Installation Guide. Ensure your vehicle is compatible before purchasing.

Easy, Bolt-On Installation: designed as a direct bolt-on replacement, this kit can be easily installed in your garage with just basic tools no cutting or modifications needed. Not suitable for modification; designed direct replacement. Install the new air intake tube in place of old system, using included silicon hose and connectors. NO others please.

Designed as a direct replacement, ensuring easy installation and perfect fit for your vehicle. Backed by a 5-year manufacturer warranty for your peace of mind.

part #: 4y6uk56u price

  • $32.86

specifications airfueldepo:

  • for models: G35, 350z, Fx35
  • for makes: Infiniti, Nissan
  • for years: 2003-2006
  • brand: Kac
  • mpn: 4y6uk56u
  • package included: 1x Air Filter, 1x Air Intake Tube, 1x Silicon Hose, 2x Silicon Connecterall Accessories On The Picture Are Included
  • filter color: Red
  • pipe color: Silver
  • inlet diameter: 3.00in
  • heat shield: No
  • mounting hardware included: Yes
  • type: Cold Air Intake Kit
  • placement on vehicle: Front
  • surface finish: Polished
  • universal fitment: Direct Replacement
  • material: Aluminum
  • manufacturer warranty: 5 Years

general airfueldepo:

  • Car Truck Parts Accessories > Air Fuel Delivery > Other Air Fuel Delivery
  • condition: New

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shipping airfueldepo:

  • class: Standard
  • transit: 2-6 Days
  • service: Standard
  • cost: $0.00
  • type: Fixed

returns airfueldepo:

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

offer airfueldepo:

  • best offers: True
  • sold: 0
  • options: Ship-to-home
  • started: February 18, 2026
  • availability: In Stock

seller airfueldepo:

  • rating: 98.6%
  • # reviews: 1201
  • city: New Jersey
for models: g35, 350z, fx35, for makes: infiniti, nissan, for years: 2003-2006, package included: 1x air filter, 1x air intake tube, 1x silicon hose, 2x silicon connecterall accessories on the picture are included, filter color: red, pipe color: silver, inlet diameter: 3.00in, heat shield: no, mounting hardware included: yes, type: cold air intake kit, placement on vehicle: front, surface finish: polished, universal fitment: direct replacement, manufacturer warranty: 5 years,
category: auto parts > car truck parts accessories > air fuel delivery, material: aluminum, sku: 13678688283940731,

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1 offer $32.86 USD
  • Offer #1: $32.86 price + $0.00 shipping estimate = $32.86* total. - This cold air intake kit is designed specifically for the following models: for 2003-2006 INFINITI G35 all engines, for 2003-2006 Nissan 350Z all engines, and for 2003-2006 INFINITI FX35 all engines. Starter For Infiniti G37 2008-2013 & G25 2011 2012 & M37 2011-2013 & FX37 2013.FREE SHIPPING

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