6 inch air filter
Skip itBrand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$49.88avg listing price — sweet spot $15–$100
Market size
Great$1.7M$1.7M/yr · 1.2M searches
Competition
Good42%top-5 click share — leaders hold, buyers still browse
Returns
Okay3.0%return rate — above 6% kills the launch gate
Review moat
Okay2,149.31avg incumbent reviews — the moat a new listing must climb
Conversion
Okay2.9%search→purchase rate — share of searches ending in a sale
Price range
Okay$12.42–$249.10cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+2.1%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Brand share
Bad99%top-5 brand share — brand-locked demand
Competition
The top 5 products take 42% of clicks — established leaders, but buyers still shop beyond them.Brands
7 falling
Sellers
86
Top-5 brand share
99%
Open market
1%
- K&N92%
- LAINLOY2%
- FALVFUN2%
- Spectre2%
- Rtunes Racing1%
- TIEVISHO1%
- Open — no brand owns it (1 brand, 1%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 45 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance Premium: Flange Diameter: 4 In Filter Height: 5.5 In Flange Length: 1.125 In Shape: Round Tapered RG-1001RD
K&N$35.244.6★5,136 rev
K&N High-Flow Original Lifetime Universal Clamp-On Air Filter: High Performance Premium Washable: Flange Diameter: 6 In Filter Height: 6.5 In Flange Length: 1 In Shape: Round Tapered RU-1042
K&N$64.984.7★857 rev
K&N High-Flow Original Lifetime Engine Air Filter: Increase Power: Premium Washable: Compatible with 2019-2026 Cadillac/Chevy/GMC: Escalade Silverado Suburban Tahoe Sierra Yukon 33-5083
K&N$58.014.8★1,720 rev
K&N High-Flow Original Lifetime Engine Air Filter: Increase Performance Premium Washable: Compatible with 2007-2026 FORD/LINCOLN: Expedition F150 F250 F350 F450 F550 F560 Navigator 33-2385
K&N$57.124.8★3,379 rev
K&N High-Flow Original Lifetime Engine Air Filter: Increase Power: Washable: Compatible with 2017-2026 HYUNDIA/KIA: Elantra I30 Kona Veloster Cerato Forte ProCeed Seltos Soul Xceed 33-5050
K&N$55.074.8★910 rev
Newest
by launch date
FALVFUN Car Clamp-On Air Intake Filter 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters High-Performance Washable Auto Replacement Intake Filtering Accessories Universal Fit (Red)
FALVFUN$13.1644 rev
FALVFUN Car Clamp-On Air Intake Filter 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters High-Performance Washable Auto Replacement Intake Filtering Accessories Universal Fit (Black)
FALVFUN$12.4244 rev
3 3.5 4 Inch Cold Air Intake Filter 76mm 89mm 101mm High Performance Washable 3 Sizes in 1 Clamp-On Replacement Cone Air Filter Black
TIEVISHO$27.8285 rev
Universal Clamp-On Air Intake Filter High Flow Closed-Top Cool Air Filter Cleaner 76 89 102MM Performance Round Tapered Cone Air Filters Washable Replacement Filter for Car Truck (Red)
LAINLOY$16.14449 rev
K&N Engine Air Filter: Long Life 18 000 Mile Replacement Air Filter: Compatible with 1999-2020 Chevy/GMC Truck/SUV V6/V8 (Silverado Suburban Tahoe Sierra Yukon Avalanche) KNA-2129
K&N$18.51481 rev
Trending
90-day click momentum
K&N LIFETIME Cabin Air Filter: Premium Washable Clean Air for your Cabin
K&N$39.234.6★
FALVFUN Car Clamp-On Air Intake Filter 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters High-Performance Washable Auto Replacement Intake Filtering Accessories Universal Fit (Black)
FALVFUN$12.423.9★
3 3.5 4 Inch Cold Air Intake Filter 76mm 89mm 101mm High Performance Washable 3 Sizes in 1 Clamp-On Replacement Cone Air Filter Black
TIEVISHO$27.824.4★
FALVFUN Car Clamp-On Air Intake Filter 3 In 3.5 In 4 In Round Tapered Vehicle Cone Air Filters High-Performance Washable Auto Replacement Intake Filtering Accessories Universal Fit (Red)
FALVFUN$13.163.9★
Universal Clamp-On Air Intake Filter High Flow Closed-Top Cool Air Filter Cleaner 76 89 102MM Performance Round Tapered Cone Air Filters Washable Replacement Filter for Car Truck (Red)
LAINLOY$16.144.2★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +2.1% search growth over the last 90 days.Peak months: Mar, Apr, May, Nov · busiest ÷ quietest = 7.5×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Great filter”
“Excellent fit”
“Cant beat the quality”
“Worth the money”
“Easy to install”
“As advertised”
“Cleans great”
“it always helps with my mileage”
“Works well”
“efficiency alongside long-lasting reusability”
What buyers complain about
“Too small”
“Not compatible”
“Worst air filter ever”
“K&N filters have gone down in quality”
“A bit pricey”
“clearly used instead”
“I received it dirty”
“I don't really like that unless it's stated in the description so the consumer knows what they're buying”
“Smells like a garbage can”
“Its pretty hard to clamp on there and somewhat confusing”