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STILLEN Hi-Flow Catalytic Converters

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Hi-Flow Replacement Catalytic Converters

STILLEN now has high flow replacement catalytic converters for the Nissan 350Z, 370Z, Infiniti G35 Sedan, G37 Coupe and the 2014 Infiniti Q60. These are for the enthusiast that wants the best flow possible, while remaining environmentally responsible.

Though these converters are not CARB legal, they are a step above race or test pipes and will result in a less "raspy" tone. As high performance cats, some sound increase should be expected. STILLEN Hi Flow Catalytic Converters reduce emissions and unpleasant exhaust smells.

Features & Benefits:

  • Increased flow and efficiency
  • Up to 9-10 Rear wheel horsepower
  • Metallic Catalytic Converters - Pair
  • Stainless Steel Construction - Spun Metallic Core
  • Bolt-On Installation - Flanged for OEM Fitment
  • Performance Increase of 9-10 whp / 8 FT Lbs. of Torque
  • **Not For Sale In California**

Additional Notes:

  • Some customer's report slight rasp sound
  • A small percentage of customer's report SES lights turning on. O2 extenders should eliminate this issue.

Shop Install Time: 1 hr.


Stillen warrants the product(s) herein to be free of "out of the box" manufacturing defects only (cracked welds, bent or damaged pipe or flange). We strongly suggest you inspect the product prior to installation. After installation the products sold hereunder are without any warranty of any kind. Stillen hereby disclaims all warranties and conditions with regard to the products after installation including all implied warranties and conditions of merchantability and fitness for a particular purpose. Stillen does not warrant against damages or defects arising out of use of the products; against defects or damages arising from improper installation, or against defects in products or in components after installation. No warranty of any kind, expressed or implied, is made regarding the safety of the products. These product(s) are designed for OFF ROAD or RACE use only and the purchaser acknowledges that they will be used only in those venues.



About STILLEN Parts & Accessories

Steve Millen Sportparts, Inc. and STILLEN humbly started their race to the front of the pack in 1986. Starting with aftermarket mini-truck appearance packages, we quickly found ourselves fulfilling customer's requests to build products for other vehicles such as vans and full-sized trucks.

With that came performance parts, suspension pieces, and upgraded brake products such as big brake systems. Capitalizing on his racing career, and knowing what it took to make sports cars perform like no other, it was only natural for Steve Millen to branch out into the import car scene. Over two decades later, we offer a full array of products encompassing styling, performance, handling, and braking products for just about any car, truck, or SUV.


Hi-Flow Catalytic Converters

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