HKS® (02-07) Infiniti G35 Coupe 304SS 3" Catalytic Converters
HKS® (02-07) Infiniti G35 Coupe 304SS 3" Catalytic Converters


HKS® (02-07) Infiniti G35 Coupe 304SS 3" Catalytic Converters

Regular price$2,050.00
Shipping calculated at checkout.
  • Question? Call us at (888) 257-1077 🏁
  • This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

    Compatible: (3.5L)

    2002 - 2007 Infiniti G35 Coupe







    The Metal Catalyzer that has both high output and high purification system.



    • Metal Catalyzer for both MT and AT.
    • 150 cell catalyzer is used for both exhaust efficiency and durability.
    • High efficiency gives 5 to 7ps up. The choked feeling is also improved.
    • It's designed for supercharger spec power up, therefore you don't have to worry about the NA, turbo or supercharger for installation.

    * When you install the Metal Catalyzer, the exhaust sound tends to get bigger. Please be careful for Z33 that could have 3 to 4dB higher depending on the type of muffler or the time-related deterioration.







    Other parts
    Part Quantity Size
    Stud bolt 4 M10
    Nut w/ flange 6 M10
    Nut 4 M10 P=1.5
    Nut 2 M10 P=1.25
    Bolt 4 M10 L=40 P=1.5
    Bolt 2 M10 L=25 P=1.25
    Spring washer 6 M10
    Plain washer 12 M10
    Gasket 2  


    Make Classification Model Engine Year Pipe Size Code No. Remarks
    INFINITI UA- G35 2D VQ35DE 2002 - 2007 D60 - D60 33005-AN003 For 6MT & 5AT



    Extension + center pipe characteristic (for R35)

    It enables a total tuning from the exit of turbo to the center pipe. The balance from both of "exhaust gas cleaning" and "loss of low pressure" make better boost start and still environment friendly. Stock has 4 catalyzers, but HKS Metal Catalyzer has only 2. These 2 catalyzers in the first section did pass the Japanese exhaust regulation. These 2 instead of 4 catalyzers lead to better performance for exhaust system. The extension part of the turbo exit is mode with "Lost-wax casting" method. If the sheet metal working or press working is used, it has turbulence by the speed of the welding. But, HKS catalyzer has no inequality inside and allows a smooth flow.


    * Exhaust gas test certificate is included.




    Extension + Front pipe characteristic (for GRB)

    Usually, under higher output, purification performance maybe low. But, HKS catalyzer has both high output capacity and still has high purification performance. HKS catalyzer is 150 cells which make it less pressure for exhaust air thus produce higher output. Also the thickness of the fin to 0.1mm achieves better heat-resisting property. Compared to stock catalyzer, both power and torque of mid RPM performance went up and has stable performance even for the high RPM.


    * Exhaust gas test certificate is included.




    Characteristics of round type (for CZ4A)

    300 cell and 150 cell (stock: 600 cell and 400 cell) combination type. Purification capacity is 300 cell level and 150 cell level for pressure, and the size is φ65 (stock: φ60). The higher output and higher purification and well-balanced. By making it less exhaust pressure for 1st and 2nd, it helps to provide better boost start and have less influence for turbo charger. From year 2005, Japan exhaust regulation became more strict, but our product passed regulation.


    * Exhaust gas test certificate is included.







    Universal sport type catalytic converter that can be used various level of tuning cars. It is well balanced for high horsepower and high cleaning performance.


    Target Horsepower 500 - 600PS. It is well balanced for high horsepower and high cleaning performance. Oval and Round types are released for various vehicles. Oval Type can be used for D85 - D90 and Round Type can be used for D115. (Modification is required.) As they are universal type, flanges need to be welded.


    Recently, a lot of high performance cars feature electronic control of damping force adjustment. HKS assumed it would be best to keep stock electronic control system but add an additional flexibility and offers a height adjustable spring. HKS height adjustable springs kits are a great alternative to conventional springs. With included high adjuster it is possible to select different height suiting your car and enjoy more sporty ride.

    In October 1973, two talented and spirited young engineers had a vision; to design and build high performance engines and components that major OE manufacturers could not or would not produce.


    Led by Hiroyuki Hasegawa, a former engineer for Yamaha Motor Company, and his partner Mr.Kitagawa, the two secured a capital infusion from Sigma Automotive Co., Ltd. (hence the name “HKS ”), and began tuning gasoline powered engines in a dairy-farming shed at the foot of Mount Fuji in Japan.


    A year later, Mr. Hasegawa designed and built the first aftermarket turbocharger for passenger cars and has never looked back.


    HKS pioneered the Japanese aftermarket performance industry by delivering a host of exciting new products, including the first commercially available electronic turbo timer and boost controller. Other early products included piggy-back fuel computers and sophisticated fuel management tools.  Clearly HKS was Driving Performance trends for Japanese vehicles.


    Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa ’s strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company ’s success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts’ needs. Moreover, HKS’ products are designed to be user friendly for easy installation.


    Today the automotive aftermarket industry is filled with start-up companies following in HKS’ footsteps.  None however, can match the depth of engineering or manufacturing resources available to the talented, highly motivated and dedicated employees of HKS.


    For over a quarter century HKS products have been put to the test in drag racing, road racing, rallying, and top speed trials.  HKS equipped vehicles have captured numerous racing championships and hold claim to a myriad of competition records using many “off the shelf”, race proven HKS components.  As a result, HKS has been synonymous with “performance” in the automotive aftermarket industry for the past 35+years.