Fitch® Fuel Catalyst - OEM In-Line Fuel Catalyst

8 reviews|Item # sp822
$215.55 - $523.55
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OEM In-Line Fuel Catalyst by Fitch®. Get improved performance and reduced emissions with the Fitch Fuel Catalyst! Unlike expensive additives that must be continually replenished, you purchase this product once, for 250,000 miles of maintenance-free gains. Specially made to connect into the fuel system, using the factory quick-connect fittings.

Fitch Fuel Catalyst


  • Increases fuel economy
  • Increases horsepower and torque for improved performance
  • Reduces emissions
  • Boosts gasoline octane rating and diesel cetane rating
  • Makes fuel burn cleaner, extends engine oil life
  • Reduces engine carbon deposits
  • Reduces engine fuel system and injector maintenance
  • Maintains fuel quality during extended periods of storage
  • Easy bolt-on installation using quick-connect fittings in factory fuel line
  • Improvements verified in numerous national publications
  • Maintenance-free and warranted for 250,000 miles or 5,000 operating hours (the lifetime of the engine)

Gasoline and diesel fuel are both highly refined to meet fuel system quality and emissions standards. Unfortunately, by the time the fuel reaches your tank, its quality has drastically diminished. During storage and transportation, fuel degrades from attack by oxygen, ozone, and microorganisms that grow in fuel. This degraded fuel causes reduced engine efficiency, increased emissions, soot build-up, and deposits in engine oil and injectors.

alt The Fitch Fuel Catalyst re-refines fuel to its most optimal state, which enables your engine to operate more efficiently. With the catalyst your engine will make more power, get more miles per gallon, and produce fewer harmful emissions. The OEM In-Line Fuel Catalyst connects into the factory fuel system at the factory fuel line quick connect fittings. Everything required to install the catalyst unit comes with the kit, including mounting bracket, fuel line disconnect tool, and high pressure hose with male/female quick connect fittings.

The Fitch Catalyst is a Heterogeneous Metallic Alloy (HMAC) that transforms the molecular composition of fuel at ambient temperatures and pressures. It creates a cleaner burning fuel that produces higher energy yield with zero to ultra-low soot deposits. Besides improving engine efficiency, the Fitch Catalyst will reduce engine oil contamination, extending oil change intervals, and reducing maintenance costs. The Fitch is a true catalyst, a substance that causes a chemical reaction without itself undergoing any permanent change. Unlike fuel additives, which are continually used up and must be added again, the Fitch Fuel Catalyst will never be used up, giving you reliable service for the life of your engine.

The manufacturer warrants that the installation of a Fitch Fuel Catalyst will not void the manufacturer's warranty or cause the emissions non-compliance of the engine on which it is installed for the life of the catalyst from the date of installation.

Fitch® Fuel Catalyst was founded by the late John C. Fitch, a famous race car driver and inventor of safety innovations for the highway and the race track. The company's objective is to commercialize innovations in transportation and energy efficiency. Fitch Fuel Catalyst manufactures the fuel treatment device of the same name, which reformulates and re-refines gasoline and diesel fuel. After treatment with the Fitch Fuel Catalyst, fuel is cleaner burning and higher in octane/cetane rating, for improved fuel economy, increased horsepower and torque, and reduced emissions. Unlike fuel additives, which must be continually replenished, the Fitch Fuel Catalyst will not dissolve or lose its potency during its life expectancy of 250,000 miles.


The Fitch® Fuel Catalyst products have a ninety (90) day money back guarantee provided the installation instructions were followed correctly and the return of the product is based either on product defect or dissatisfaction with the product's performance. The Fitch Fuel Catalyst device is maintenance free, based on its installation being after all filters. Some cleaning will be required when used with heavy bunker oils.

The Fitch Fuel Catalyst device is guaranteed to be free from defects in material and workmanship for a period of 250,000 miles (defined by EPA in 40 CFR 85.117), or 5,000 operating hours and in the case of commercial grade FHD units 500,000 miles or 10,000 operating hours from the date of installation. For installations on boilers and heating systems the HO-UL series is for 10 years on a single pass residential system and for commercial applications the HO-UL and FHD-UL series the warranty is 8 years on #2 oil and 5 years on #4 & #6 oil. In the case of continuous commercial applications it is 10,000 working hours. The manufacturer warrants that the installation of Fitch Fuel Catalyst product on any equipment will not cause the equipment on which it is installed to have any mechanical problems for the life of the catalyst from the date of installation subject to the equipment being mechanically sound.


The Manufacturer assumes no liability for faulty or improper application of its products or resulting from collision or abuse. All claims under the Manufacturer's warranty must be made during the applicable warranty period and the product claimed defective or non-conforming returned by Buyer. Return the defective device along with dated proof of purchase to the distributor from which the device was purchased so that the distributor may handle your warranty claim in an expeditious manner. Manufacturer will repair, or at its option, replace any defective or non-conforming product and return the repaired or replacement product without charge.


Manufacturer's warranties shall not be enlarged, diminished or affected by, and no obligation or liability shall arise or grow out of Manufacturer's rendering of technical advice or in service in connection with an order or the goods furnished. Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages or exclusions of implied or deemed conditions or warranties, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from jurisdiction to jurisdiction.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More



Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

Fitch® Fuel Catalyst - OEM In-Line Fuel Catalyst
Fitch® Fuel Catalyst - OEM In-Line Fuel Catalyst
Average Rating: 4.8 of 5
5 of 5
Fitch Fuel Catalyst
My Ford focus is rated at 24 city and 34 hwy, but with the Fitch I am getting a consistent 33 city. On a long distance drive up to Bear Lake I had 49.1 mpg. That drive was all up hill. I had 58.3 down hill. I did combine the fitch with the K&N air filter and the Tornado.
Posted by (Provo, UT) / 2008 Dodge Grand Caravan
Was this review helpful for you? Yes
5 of 5
Very Pleased With Fitch Fuel Catalyst
After reading many positive reviews I purchased the fitch fuel catalyst. Installation was easy, it looks really nice in the engine compartment, and it works well with the other performance products I purchased. I am particularly happy with how I can use 89 octane fuel even though the tuner I purchased is set for 91 or higher octane.
Posted by (Sun Prairie, WI) / 2007 Saturn Sky
Was this review helpful for you? Yes
4 of 5
Fitch Fuel Catalysts 2013 Nissan 2.5sv
Installing the fuel catalysts was simple and only took about 30min. Added torque and horsepower. Rpms stay about 300-500rpms lower than before. The power I had at 3,000rpms I now have at 2,500. Using 87octane averaging about 32.4mpg. Adding about 3mpg. Well worth the money and it will pay for itself in the long run.
Posted by (Menlo, GA) / 2013 Nissan Altima
Was this review helpful for you? Yes
5 of 5
It Works!
I was initially skeptical of the claims, but I bought one with hope. Was extremely easy to install (about 20 min). I drive a full size Chevy truck. If I keep my foot out of the throttle, on the highway, I see about a 3-mpg increase (not much in the city). When I put my foot in the throttle, there is a noticeable increase in power. Also, my idle has never been so smooth.
Posted by (Alsip, IL) / 2008 Chevy Avalanche
Was this review helpful for you? YesThis review was helpful for 3 users!
5 of 5
Very easy to install
Very easy to install on my Chevy after I find good position for mounting. After I installed the Fitch Fuel and I can feel my Engine idle smoother than before. Recommend!
Posted by (Gibson, LA) / 2008 Chevy Cobalt
Was this review helpful for you? YesThis review was helpful for 4 users!
5 of 5
Very Nice way to start saving fuel
I was looking for ways "How to save a Fuel". My "beast" love to eat and drink so much, I had to put him on a diet :) This Fitch Fuel Catalyst really works, I gave it a week to see how much fuel I was saving. And it was between 2 to 3 mpg. I installed it in the engine compartment driver's side radiator cover. You will need a special tool to remove the fuel clip and once your remove that, I just had to remove one screw on the top right side of the radiator and replaced it with a longer screw. Total install took about 25 min. I'm happy.
Posted by (Prescott Valley, AZ) / 1989 Chevy Camaro
Was this review helpful for you? YesThis review was helpful for 1 user!
4.8 of 5
More Power
Had it a few weeks on my Jeep Wrangler 1995. Seemed to give a more power and smoother engine performance. Don't notice the fuel to go as quickly as before, need a month or so more to get the exact mileage, but sure seems to have improved.
Posted by (Monroeville, PA) / 1995 Jeep Wrangler
Was this review helpful for you? YesThis review was helpful for 3 users!
5 of 5
I am a long time believer in Fitch. Been using the pellet type for years now. Read all the hype and one day just decided to order some and try it for myself. It works so well I have hundreds and hundreds of dollars of these things in use right now in all manner of fossil fuel burning items, although this is the first time I've ever ordered this canister type for a vehicle. I don't look at Fitch as a mileage thing. To me, it's simply a "best fuel you can possibly burn" kind of thing. I'm sure there's some extra mileage in there somewhere, but what I like is looking at the exhaust of all my stuff (lawn mowers, generator, snowmobiles, kerosene heaters, weed whackers, my truck, etc.) and seeing CLEAN mufflers and CLEAN burning kerosene heaters and CLEAN tailpipes, as well as CLEAN carburetors and CLEAN fuel injectors. Was talking with a good friend of mine a few years back about Fitch. I took him into my garage and showed him the business end of my kerosene space heater (the kind that looks like a jet engine). His exact words upon seeing my totally clean kerosene heater that I use as my sole source of heat in the garage during the winter was, and I quote, "Holy sh**!" :) Needless to say the man is a Fitch man, today. :) If the fuel is burning so much cleaner with Fitch than without it you just know you're squeezing every ounce of energy from whatever it is you're burning. :)
Posted by (Lapeer, MI) / 1997 Dodge Dakota
Was this review helpful for you? YesThis review was helpful for 5 users!
Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

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