FlowCat
O2 Sensor Spacer + Catalytic Converter Cleaner Kit
26,268 sold
326 sold in the last 24 hours
- Regular price
- $23.98 USD
- Sale price
- $23.98 USD
- Regular price
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- • Short trips, extended idling and incomplete combustion can leave residue on the catalyst’s internal honeycomb, reducing the active surface available to process exhaust gases.
- • This two-part kit supports the system from two points: the fuel-tank treatment works through the combustion and exhaust path to help loosen deposits, while the compact mini-catalyst adapter installs between the exhaust port and a compatible oxygen sensor.
- • P0420 relates to catalyst-efficiency readings on Bank 1, while P0430 relates to Bank 2. These codes indicate efficiency below the expected threshold—but they do not identify the exact failed component.
- • Exhaust leaks, aging sensors, wiring faults, misfires, contamination and converter wear can produce similar readings. The cleaner supports deposit-related maintenance, while the adapter is a fitment-specific sensor-port component. Diagnose the root cause before installation.
- • When the catalytic substrate is still intact and reduced efficiency is associated with deposit buildup, the fuel-tank treatment may help loosen residue. On compatible vehicles, the adapter adds controlled spacing and an integrated mini-catalyst core at the oxygen-sensor port.
- • This kit cannot rebuild melted ceramic, seal cracks or exhaust leaks, replace a failed sensor, repair damaged wiring or correct an active misfire. A broken or collapsed converter requires mechanical inspection and repair.
- • Catalytic converters work most effectively after reaching full operating temperature. Frequent short trips, stop-and-go traffic and extended idling can interrupt that process, while high-mileage vehicles may carry years of residue and component wear.
- • For compatible, mechanically intact systems, the kit combines periodic internal cleaning with compact sensor-port hardware. Correct active engine faults first, verify vehicle and thread compatibility, and use both products according to their individual instructions.
FlowCat®
Awards & Certifications
Indicates that the electromagnetic radiation from the FlowCat® unit is below the limits specified by the Federal Communications Commission.
Indicates that Pedal Commander® meets strict emission standards set by the California Air Resources Board.
Pedal Commander® is a proud member of the Specialty Equipment Market Association and has been awarded numerous times.
FlowCat®
Influencers & Athletes
Odi Bakchis
Professional Drifter
It's not laggy. It feels like a
racecar; you get a response!
Corey Funk
Influencer
In sport mode, there's a huge
difference!
Tony Fergusson
UFC Fighter
This is awesome. Whoever made
this is a genius.
Cadence Cowan
Off-Road Racer
Better throttle response with
holeshots.
Matt Field
Formula Drift Driver
I definitely notice the difference!
FlowCat®
Customer Reviews
Stella Ross
05/14/2026
Installation Didn’t Take Long
Once the original sensor was removed, installing the adapter and reinstalling the sensor was straightforward. Most of the time was spent safely raising the vehicle and allowing the exhaust to cool.
Olivia Carter
04/17/2023
Noticeably Smoother Idle
My sedan has more than 100,000 miles, so I’m careful about maintenance.
Owen Coleman
11/16/2025
No Rattles or Loose Connections
After correct installation and several weeks of normal driving, the connection has remained secure. I haven’t noticed rattling or movement around the sensor area.
Emily Foster
09/28/2023
Helped With the Harsh Exhaust Smell
I bought this for an older SUV with a noticeable exhaust odor. After using it as directed, the smell seemed less harsh and the vehicle felt smoother during everyday driving.
Sophia Ward
08/16/2026
Perfect Before a Road Trip
I added this to the fuel tank before filling up for a weekend road trip. The vehicle ran smoothly throughout the drive, and I liked knowing I had taken an extra maintenance step before putting on a lot of highway miles.
Gavin Perry
04/08/2025
Simple Part That Does Its Job
There are no complicated moving pieces or unnecessary extras. It’s a compact, solidly made adapter that created a neat threaded connection with my existing oxygen sensor.
Lily Morgan
08/22/2024
Compact Bottle and Easy Pour
The bottle arrived sealed and was the perfect size for a single treatment. It poured neatly into the fuel tank without spilling, and the directions were easy to understand. The whole process was much easier than expected.
Eli Barnes
01/14/2024
Would Use It Again
The fit, finish and installation experience were all positive. As long as the thread size and vehicle clearance are confirmed first, I would be comfortable purchasing another one for a compatible vehicle.
Ryan Mitchell
01/09/2026
Steadier in City Traffic
Most of my driving is short trips with plenty of stopping and starting. A few drives after using this treatment, the car seemed to idle more evenly and felt smoother when pulling away from traffic lights.
Isaac Powel
11/25/2025
Simple Part That Does Its Job
There are no complicated moving pieces or unnecessary extras. It’s a compact, solidly made adapter that created a neat threaded connection with my existing oxygen sensor.