How to inspect your air filter fast!

How to check the air filter without having downtime waiting for parts or wasting time because it was good. This is probably the second best use of a borescope for mechanics idea to date. Comment below on what you think and what number 1 is?
Purchase Link: https://s.vevor.com/bfQR60
Discount Code: VVSALE5 (5% off）
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Full borescope steering wheel review:
   • See inside anything with a  Vevor Articula...  
Borescope comparison/Mouse/Bolt in Transmission video
   • Vevor Borescope Endoscope: What do you wan...  

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Click the links to playlists: (most popular)
Tip of the day:    • Tech Tip of the Day  
Harley EVO:    • "How To": Evolution Style V-Twin Engines  
Harley Twin Cam:    • "How To": Twin Cam Harley Davidson Engine ...  
4-Stroke Engines:    • "How To": 4-Stroke-Engine Overhaul  
2-Stroke Engines:    • "How To": 2 Stroke-Engine Overhaul  
Small Engine:    • "How To": Small Engine Systems  
Every Mechanic Should Know This Training":    • "Every Mechanic Should Know This" The Coll...  
Transmission:    • "How To": Transmissions Systems  
Wheels, tires, brakes:    • "How To": Tires / Wheels / Brakes Systems  
Electrical:    • "How To": Electrical Systems  
Fuel, air, intake:    • "How To": Fuel / Intake Systems  
Suspension:    • "How To": Suspension Systems  
Product/Tools Reviews:    • Product / Tool Reviews  

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