Performance Filter Sciences

14” x 4” Dirt Racing / Off-Road Air Filter

14” x 4” Dirt Racing / Off-Road Air Filter

Maximum Power - Unmatched Engine Protection!  The same advanced filtration technology that protects the world’s most expensive off-road engines also provides unmatched protection for dirt racing engines.  No oiling.

The premier dirt racing air filter!

Availability: Product in Stock


 In Stock

  • Ideal for race applications to 1400 HP - Late Model, Dirt Mods and Trophy Trucks
  • Spyder Fast Flow Technology™ for precision carburetor metering - more power and improved throttle response.
  • Composite polymer matrix web fiber engineering for unmatched engine protection   Dust-Free…. Guarantee!
  • Reusable and long-lasting. While fully washable using mild detergents, you can restore your filter to near-new condition each time in only minutes using compressed air directed from inside-out.
  • Soft, two-stage sealing beads ensure the filter seals tight against the base and lid
  • Outperfoms the oversize, offset filters in every measured category!
  • Quick & simple maintenance – fully washable, compressed air cleaned
  • No Gauze, NO OILING and No Filter Cleaning Kits Needed.


       In Stock - Ships within 24 hours

      Also available from leading high performance and race products retailers across the country.



Technical Data


.Spotless engines, even in the dustiest conditions! 

Guaranteed to outperform any other filter used in dirt car racing

Anything Else Is Just a Street Car Air Filter!


World-Leading Dirt Racing Filter Technology!

End unecessary engine wear and the resultant power loss.

Never again will you have to deal with fine dust on the air cleaner base, carburetor and what has collected in the oil pan. 

Spyder Professional Dirt Racing Air Filters provide more airflow resulting in more horsepower.

No dirt racing air filter made today can match the level of fine dust stopping and dust holding ability that Spyder filters provide and it's not even close!



The Best Race Air Filter Available for Dirt Late Model and Modified Applications!



* A Spyder 14" diameter dirt racing filter that's 4" in height offers 

 25% more airflow than the same height oversize diameter or offset  filters you see advertised. 



Spyder filters exclusive and proprietary Engine Defender Technology™ advanced polymer composite matrix media web stops and holds dust 4 ways.





We don’t make air filters that simply fit dirt racing vehicles. We design, engineer and manufacture precision filtration products specifically created for the significant demands of high-performance dirt racing applications!

We engineered our advanced, composite matrix media web to perform a unique and vital filtration and permeability function and this synergy creates an outstanding product that outperforms every other filter used in dirt and off-road racing.

Prior to our design work, extensive evaluations are performed by a team with over thirty years of dirt car and off-road race filtration product experience. In order to produce the best performing air filters in the business, it’s vital to fully understand the environment in which the products will operate.

The lab and test benches tell us a great deal about what race teams face in terms of important air filter criteria. We analyze post-race filters to determine dust particle size, concentration and the amount of loading that has occurred. 

Maximum Horsepower from Green Flag to Checkers!

Designing high-performance filters that are unmatched in each category of measurement requires that air flow, gravimetric and fractional efficiency, and maximum dust holding ability are all precisely engineered to ensure maximum performance for each application. Spyder dirt racing filters stop and hold particles as small as .1 micron while featuring very high dust holding capability, maximizing power while clean and loaded.

Our filters are so effective at keeping race engines spotless, they can stop airborne smoke! Never again will racers have to deal with fine dust on the air cleaner base, carburetor and what has collected in the oil pan. Spyder filters dramatically reduce silicon (dust) ingress and oil sample testing routinely shows single-digit ppm counts.  No more premature cylinder wall and valve wear caused by dust entering your engine.

No filter made today makes more power clean as well as when loaded with dust such as after a long feature.



.Dirt Racing Filter testing

  Premium filter marketed as designed for dirt racing tested at 400 SCFM

Paper filter testing

Racing paper air filter at 400 SCFM


Dust streaks such as these depicted during testing should never occur.  Keep in mind that the amount of dust visible increases with the flow rate.  This is an engine killer and you can stop it today!



Spyder dirt racing air filters are robust in design and can take a beating!

It’s a miserable feeling when you’re behind the wheel and you watch flying debris hit your car, and more importantly, the air filter. What can you do? Early in the race and going for the win, you simply hope for the best. 

Count on us for help!

Spyder dirt racing air filters are designed with a strong inner and outer screen that protects the filter media in the event of impact from debris. In addition, our filters also feature an inner mesh safety barrier that is pleated and potted into the urethane along with the media. This safety mesh mitigates the chance that impact damage may allow dust leakage and potentially expensive engine damage to occur.

Great air filter for Baja, Mint 400 and short course Trophy Truck competition.

Spyder Dirt Racing Air Filters …The best performance and value in dirt racing!

Available at the finest high performance and race products retailers across the country. 


For AK and HI shipments, please inquire

Have a filtration question of comment?

Our engineering team would be glad to discuss it with you

Spyder Super Dirt filters are the best filters ever designed for the serious demands of dirt racing vehicles. Your satisfaction is 100% guaranteed.

Customer Reviews 9 item(s)

Positive results
“My carburetor has never been so clean after a long night at the dirt track. Performance is amazing, clean up is simple and I am not filling my garbage with the old paper throw away filters” Review by Greg W / (Posted on 5/20/2024)
Best filters
I have used Spyder filters for the past 2 years and have had awesome success with them. Every time I have used other filters I see dust/dirt has made it thru. Spyder filters are by far the best on the market and not to mention good customer service. Highly recommend their product. Ray Bollinger #77 UM Review by Ray Bollinger / (Posted on 3/31/2024)
Primo filters!
We tried them all and we're never satisfied because the dust would always get past somehow.

Since we switched from the larger size filter, we have never seen a speck and the filter can be cleaned quick.

This is a outstanding race filter. Thanks Review by Laps a plenty / (Posted on 3/31/2024)
Spyder dirt filter
I have no idea how it works but this filter always keeps our stuff super clean. We go out on really dusty tracks and after racing we inspect. No dirt at all. The guys using other filters always have junk collected around the top of the carb. Thanks. Review by Bill K / (Posted on 12/17/2022)
2nd year on our filter
The filter worked great over the course of last year. We have it ready to go again for this year. Review by GaryA / (Posted on 4/14/2022)
Great dirt car filter
Always zero dirt on the carburetor and the air cleaner bottom. These work extremely well. Get one. Review by Pete H / (Posted on 6/3/2020)
Dirt Car Filter
Always incredibly clean and the car runs great. Saves us a ton of money and taking care of the filter is fast and simple. Review by Randy33 / (Posted on 5/5/2020)
Easy and fast
We ran our Spyder filter on or dirt mod all last year. Real easy to maintain and we only needed to wash it once. Just blow out the dirt and it's works great! Engine is always clean. Review by SteveB74 / (Posted on 4/10/2020)
Now we can finally stop hearing from our carb guy about how our air bleeds were always dirty.

He's happy! Good filters. Review by StuGots / (Posted on 4/5/2020)