WARNING: Cancer (and/or Reproductive Harm)

    Fast Intentions is proud to present our VQDE Resonated High Flow Cats. Our resonated high flow cats are the premier upgrade for all Nissan/Infiniti owners looking to maximize power and performance from their VQDE V6 engine. Resonated high flow cats effectively increase low end torque and maximize power throughout the entire RPM band. Your overall exhaust volume will increase, while creating a deeper and smoother tone. Built as a direct OEM replacement, resonated high flow cats are designed to be an addition to your cat back exhaust system. We maximize performance by increasing the tubing diameter, using a less restrictive catalytic converter, and adding straight through perforated core resonators to free up back pressure. This application is recommended for the enthusiast who wants to remove their OEM catalytic converters but keep the sound level to a minimum. This is our quietest option available.


    • Direct OEM replacement: no cutting or welding required.
    • 2.5″ T-304 mandrel bent stainless steel tubing.
    • The catalytic converter is a 300-cell metallic core incased within a spun stainless-steel shell.
    • 49 state OBD II compliant.
    • 8″ perforated core resonator constructed of T-304 stainless steel with a 2.5″ inside core and a 3.5″ outside case.
    • J-Bend style O2 sensor anti fouler designed to keep that pesky CEL (Check Engine Light) off. Note: In rare instances an ECU recalibration/tune may be required to eliminate CEL (Check Engine Light.)
    • 3/8″ thick mild steel flanges. All flanges are bright nickel plated to eliminate potential corrosion.
    • All flange connection points are precision Tig welded around the outside.  The inside is sanded down and port-n-polished for a smooth exhaust flow.  This process reduces exhaust turbulence at the flange connection points.
    • Optional extra wideband bungs can be welded in either one pipe or both pipes for an additional charge. A wideband bung is generally used for an Air/Fuel ratio reading on the dyno or an Air/Fuel wideband gauge within the vehicle.
    • Limited 3-year warranty on all welds and craftsmanship.
    • Resonated high flow cats are sold as a set of 2: Left / Right
    • Application Specific:
      • 2003-2006 Nissan 350Z
      • 2003-2007 Infiniti G35 Coupe
    • Compatible on Left-and Right-Hand Drive vehicles.
    • Compatible on Rear Wheel Drive and All Wheel Drive vehicles.
    • Gaskets, hardware and installation instructions are included.
    • Hand built in the USA.


    • An increased average of 18 rear wheel horsepower & 20-foot pounds of torque in conjunction with our cat back exhaust system, across the Nissan/Infiniti VQDE lineup.
    • Refining the factory exhaust note by increasing depth and volume.
    • Reduction in EGT’s (Exhaust Gas Temperature) by freeing up back pressure.
    • Weight: 15 lbs. (7 lbs. lighter than the factory catalytic converters.)


    • This product is hand built (in house) to order with a standard lead time of 3 – 5 weeks. Once your order is placed, you will receive an invoice with your estimated shipping date. Note: The lead time may fluctuate less than 3 or greater than 4 weeks based on order volume.
    • This product may not be legal for highway use on pollution-controlled motor vehicles.
    • Not legal to purchase in the state of California.
    • Customers outside the continental U.S. are subject to additional shipping charges.
    • Image(s) shown may not reflect actual product.
    Extra O2 bung

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    Nissan Infiniti High Flow Cats Installation Guide