Airspeed II Filter Adapter, from the manufacturer:
"After extensive testing, 8 prototypes, over 200 dyno pulls on 3 different motors, up against every adapter that we could find, the AIRSPEED adapter has proven without a doubt, positive gains and a broader power curve on box stock class clone engines, specifically with top end "drop off" common with other adapters.
With the added air flow, the more rich main jet ( .038 ) is mandatory for optimal engine performance. Works with all air filters that have a 2-7/16" inlet.
Brand New Complete Kit Includes:
- Airspeed Clone air filter adapter (Generation 2) (PM-007100ii)
- Choke Support
- Set Screw
- 4" Angled Air Filter (600821)
- Foam Pre-Filter (600823)
- Honda GX140
- Honda GX160
- Honda GX200
- Honda Clone Engines
- Trailmaster Mini and Mid model go karts.