inline fuel filter
Worth a lookShows low returns (1.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Great1.1%return rate — above 5% kills the launch gate
Price range
Great$5.96–$49.96cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great7.2%search→purchase rate — share of searches ending in a sale
Brand share
Great59%top-5 brand share — no brand owns this niche
Avg price
Great$14.95avg listing price — sweet spot $15–$100
Review moat
Good553avg incumbent reviews — the moat a new listing must climb
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Growth
Okay+19.6%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$164K$164K/yr · 153K searches
According to Flapen's Amazon United States niche tracking, inline fuel filter is a $164K/yr Amazon United States market (153K searches/yr). The top 5 brands hold 59% of demand. Demand peaks in Aug. Verdict: Worth a look — 61/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
inline fuel filter market data
- Units sold / yr
- 10K–13K
- avg 100–250/product
- Revenue / yr
- $150K–$187K
- units × avg price
- Conversion rate
- 7.2%
- Avg BSR
- #100
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 88%
- Out of stock
- 3.7%
- Avg brand age
- 58 months
- Avg seller age
- 163 days
Competition & brand share
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.Brands
23 falling
Sellers
70
Top-5 brand share
59%
Top 20: 98%
Top-5 click share
49%
Top 20: 89%
Open market
34%
- Wix17%
- K&N13%
- CocoMocart13%
- Snwoygr9%
- Deflife7%
- Strongthium7%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +19.6% search growth over the last 90 days.Peak months: Aug · busiest ÷ quietest = 1.8×
Top inline fuel filter search terms
- inline fuel filter113K/yr
- in line fuel filter25K/yr
- universal fuel filter10K/yr
- fuel line filter4K/yr
Top inline fuel filter products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
K&N 81-0300 Replacement Fuel Filter
K&N$9.214.5★3,954 rev
CocoMocart 10 Pack 1/4 Inch Inline Fuel Filter for Kawasaki Briggs & Stratton Kohler Engines - Universal Replacement Gasoline Filters with Magnet 1/4 and 5/16 For John Deere
CocoMocart$9.954.4★2,127 rev
Snwoygr 10 PCS Gas Inline Fuel Filters with Magnet for Kawasaki Kohler John Deere Lawn Mower Small Engine Third Generation Universal Replacement Fuel Filter for 1/4 IN and 5/16 IN
Snwoygr$6.814.4★612 rev
WIX Racing Filters Fuel Filter
Wix$6.284.7★1,244 rev
WIX 33033 Universal In-Line Fuel Filter with 3/8 Clamp-On Inlet/Outlet Max Pressure 60-PSI
Wix$7.314.8★1,477 rev
Newest
by launch date
TRHSIFF 10 PCS 1/4 Inch and 5/16 Inch Gas Inline Fuel Filters with Magnet for Kawasaki Kohler John Deere Lawn Mower Small Engine Upgrade Universal Replacement Fuel Filter with 10 Clips
TRHSIFF$7.3196 rev
EVIL ENERGY 3/8 Barb Billet Inline Fuel Filter 30 Micron Aluminum Black for Car EFI & Carb Fuel Systems Motorcycle and Boats
EVIL ENERGY$19.77107 rev
Inline Fuel Filter for Lawn Mower Small Engine Kohler John Deere Kawasaki - Gas Filter Replacement with High Flow Design (12-Pack)
WYTUDTE$8.33103 rev
Medoon 10 Micron Inline Fuel Filter with 6AN 8AN 10AN Adapter(6pcs) Barb 1/2 3/8 5/16 Fitting Adapter (6pcs) Bracket Clamp 50MM Universal 10 Micron Filter Element Replacement
Medoon$35.3862 rev
YAMAKATO 1/4 Inline Copper Fuel Filters for Dirt Mini Bike ATV Motorcycle UTV Snowmobile more with 1/4 fuel lines 2pcs with 2 clamps
YAMAKATO$6.9597 rev
Trending
90-day click momentum
AM116304 Fuel Filter 25 050 22-S for John Deere Kohler 120-436 GY20709 For 1/4 and 5/16 Fuel Line Replaces 71-5960 120-436 GY20709 38666 149-2206-01 21541500 98021
ASSOTS$6.224.6★
TRHSIFF 10 PCS 1/4 Inch and 5/16 Inch Gas Inline Fuel Filters with Magnet for Kawasaki Kohler John Deere Lawn Mower Small Engine Upgrade Universal Replacement Fuel Filter with 10 Clips
TRHSIFF$7.314.4★
FUEL FILTERS INDUSTRIAL HIGH PERFORMANCE UNIVERSAL INLINE GAS FUEL LINE 3/8 2 Pack
Deflife$9.514.5★
Quicksilver 879885Q Inline Fuel Filter for Mercury and Mariner Outboards
Quicksilver$15.484.8★
YAMAKATO 1/4 Inline Copper Fuel Filters for Dirt Mini Bike ATV Motorcycle UTV Snowmobile more with 1/4 fuel lines 2pcs with 2 clamps
YAMAKATO$6.954.7★
What buyers say about inline fuel filter
What buyers praise and complain about, mined from review topics.What buyers love
“Great filter”
“This kit is high quality”
“Good Price”
“As advertised”
“Perfect fit and exactly as described”
“Keep your fuel clean”
“The clear filter helps keep an eye on debris”
“It looks GREAT when initially installed”
“Didnt leak,”
“I like that this comes with the mount”
What buyers complain about
“Filter are junk”
“They leak”
“no quality control”
“They're a bit smaller than I expected”
“Do not last”
“This will not flow enough fuel for automotive applications”
“This hose feels like a different kind of material”
“They are spendy for what it is”
“Some of these filters either leak or are clogged”
“Not what I was looking for”
Top return reasons
Common questions
- Is inline fuel filter profitable to sell on Amazon United States?
- The niche generates $164K/yr across 33 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +19.6%. Flapen's verdict: Worth a look (61/100).
- How competitive is the inline fuel filter niche?
- 23 brands and 70 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 59% of demand.
- What do buyers complain about in inline fuel filter?
- Top complaints mined from reviews: Filtration, Leak-Proof, Quality-Overall. The return rate is 1.1%.
- When does demand for inline fuel filter peak?
- Demand peaks in Aug; the busiest month runs 1.8× the quietest.
- What does it cost to enter the inline fuel filter niche?
- Listings span $5.96–$49.96; the average listing price is $14.95 (sweet spot $15–$100). The average incumbent carries 553 reviews — the moat a new listing must climb.