Inside and outside of Twin Air Original Dual Stage 2 stroke oil filters

This is where it all began. Over 40 years ago, the sandy, gritty soil of The Netherlands – and the resulting engine failures – proved that single-foam and paper filters gave riders air flow, but failed at protection. Twin Air’s breakthrough, fused dual-layer design (now widely copied) traps even the smallest particles, while the new, rounder design and minimized, micro-glued seams boost airflow more than ever.


Inside of Twin Air Original Dual Stage 4 stroke oil filter with backfire-resistant foam lamination

Some models have a backfire-resistant foam layer laminated to the filter that eliminates the restrictive, stock backfire screen

MOTORCYCLE • ATV • WASHABLE / REUSABLE (reusing a Twin Air filter 40-50 times is common) • DUAL-LAYER FOAM (made to our specifications, with cells that are evenly sized and distributed) • GREASELESS SEALING RING • HIGH QUALITY (assembled by hand and inspected for a perfect fit) PACKAGED IN A RESEALABLE BAG

Inside and outside of Twin Air BIO Pre-Oiled Dual Stage oil filter.

For many years, Twin Air Factory Pre-Oiled filters were only available to our top professional race teams and OEM customers. Now everyone can get the same factory treatment: an Original Dual-Stage Air Filter is soaked in BIO Liquid Power Filter Oil, massaged to ensure all pores are evenly, cured in a temperature-controlled room, and sealed. You just open the resealable bag and install.


The best filter in the world can’t do its job if there are leaks in the seal of the airbox. Replace a flimsy, plastic stock cage with a Twin Air’s rigid, lightweight, billet-aluminum PowerFlow Kit to ensure a leak-proof, fool-proof fit. Custom design for each model ensures superior airflow, improved seal and easy service.


Fit this oiled, coarse foam pre-filter over your Twin Air filter for an extra layer of protection in severe conditions such as heavy dust and sand. Also extends service time between filter cleanings.



Install in a snap to open the way for maximum airflow. Our fine-toothed GP Filter Cover protects your engine from dirt and debris. Includes a black outer cover to close off the vents during wet conditions. Round or oval. 2 vents & caps.

You’d be amazed at the dirt and debris that can work its way into your gas can – and from there, your fuel tank. Twin Air’s monofilament screen pocket inserts in your tank to catch particles as small as 40 microns (.00165”).



The company that set the clean air standard for your engine extends their expertise to oil filters. Now there’s only one name you need to remember for maximum protection, perfomance and value in all of your filters and related products: Twin Air.


Shed mud, dirt and sand before it can build up and choke your radiator. Simply remove the radiator louvers and slide this tough, breathable barrier of nylon-coated, glass yarn mesh over them. Elastic bands ensure a snug fit, with holes pre-punched for mounting pins as models require.

Two bikes after riding in the same moto. The bike
radiator without Twin Air Radiator Sleeves was
full of mud and overheated.

Motocross bike after racing using the Twin Air Radiator Sleeve.
Motocross bike after racing without using the Twin Air Radiator Sleeve.

Twin Air MUD Deflector foam, no more mud hanging under the fenders! Deflector foam prevents the mud from sticking under the fenders, helping to eliminate added weight to the bike. The foam is pre-cut in bike specific dimensions and has a peel-off tape layer for easy mounting.



A newly developed TPU material prevents mud build up on the radiator louvres; allowing the radiator to continue to maintain operating temperature. The MUD sleeves are a universal product for all Off Road bike radiators and are easily mounted with zip-ties.


Twin Air Skid Plate Foam blocks dirt between engine gaps, skid plate and surrounding areas.


This black polyurethane/polyester reticulated foam (40mm thickness, 30 PPI) blocks dirt from gaps between the engine and the skid plate and other adjacent areas.

Twin Air Foot Peg Foam prevents mud and dirt from sticking to foot pegs


This 30 PPI black polyurethane/polyester reticulated foam is formulated to prevent dirt and mud from sticking on foot pegs.

Twin Air Helmet Mud Deflectors keeps mud and dirt build up from the top of the helmet.


Used in large tanks of high performance vehicles, these impenetrable polyurethane polyester cubes baffle fuel to control surging, eliminate sloshing and the slapping noise, and stabilize fuel movement during sharp turns. Performance is improved, and fuel capacity loss is less than 1%.


Mounted on top of the helmet, this self-adhesive open reticulated foam (5mm thickness, 60 PPI) sheds dirt and mud like a duck sheds water.

Rider using Twin Air Helmet Mud Deflector.


Secured in front of the radiator, this black polyurethane/polyester reticulated foam is used on sand tracks to protect the radiator from dirt clogs. 10mm thickness, 30 pores per Inch (PPI).


Teams use our white polypropylene gauze on hard pack tracks to protect radiators from
stone damage.

Twin Air Radiator Foam protects radiators clogs on sand race tracks.
Twin Air Radiator Gauze protects radiators from stone damage.