5/16 fuel line
Worth a lookShows searches that convert (15.5% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Conversion
Incredible15.5%search→purchase rate — share of searches ending in a sale
Returns
Great1.4%return rate — above 5% kills the launch gate
Avg price
Great$16.57avg listing price — sweet spot $15–$100
Price range
Great$6.64–$43.57cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$575K$575K/yr · 224K searches
Review moat
Good1,428.5avg incumbent reviews — the moat a new listing must climb
Growth
Good+21.1%90-day search growth — must beat 0% to launch
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Competition
Bad70%top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, 5/16 fuel line is a $575K/yr Amazon United States market (224K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in May. Verdict: Worth a look — 56/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
5/16 fuel line market data
- Units sold / yr
- 30K–40K
- avg 2,500–3,000/product
- Revenue / yr
- $497K–$663K
- units × avg price
- Conversion rate
- 15.5%
- Avg BSR
- #20
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 47 months
- Avg seller age
- 171 days
Competition & brand share
The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
13
Top-5 brand share
83%
Top 20: 100%
Top-5 click share
70%
Top 20: 100%
Open market
9%
- HOUSUN26%
- dojobkinb26%
- EVIL ENERGY12%
- CMOOD11%
- Eunice9%
- ALLWIN8%
- Open — no brand owns it (4 brands, 9%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +21.1% search growth over the last 90 days.Peak months: May · busiest ÷ quietest = 1.7×
Top 5/16 fuel line search terms
- 5/16 fuel line156K/yr
- 5/16 fuel hose25K/yr
- 8mm fuel line8K/yr
- 5/16 id fuel line6K/yr
- fuel line 5/166K/yr
- 5/16 fuel injection hose5K/yr
- 5 16 fuel line5K/yr
- 5/16 fuel line hose3K/yr
- fuel hose 5/163K/yr
- 5/15 fuel line3K/yr
Top 5/16 fuel line 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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
5/16 Inch (8mm) ID Fuel Line Hose 10FT NBR Rubber Push Lock Hose High Pressure 300PSI for Automotive Fuel Systems Engines
dojobkinb$10.614.6★5,527 rev
HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.
HOUSUN$11.234.6★1,790 rev
5/16 ID Fuel Line Hose SAE 30R7 150 psi 25 Length Fuel Hose
CMOOD$24.044.6★745 rev
EVIL ENERGY 5/16 Fuel Hose Line Push Lock NBR Rubber SAE 30R7 10FT 300PSI
EVIL ENERGY$22.784.8★2,325 rev
5/16 Inch (8mm) ID Fuel Line Hose 10 FT 302PSI Push Lock NBR Rubber Hose for Automotive
Eunice$9.054.6★1,837 rev
Newest
by launch date
mycheng 5/16 Fuel Line NBR Rubber SAE 30R7 25FT 300PSI Hose
mycheng$29.5119 rev
ZONBANG 5/16 Fuel Line NBR Rubber 5/16 Fuel Hose Nylon Braided Fuel Line Hose for Automotive Vehicles(5FT)
ZONBANG$6.77324 rev
5/16 Inch ID Fuel Line Hose - 10FT Marine Grade Fuel Line with 10PCS Hose Clamps 300PSI High-Pressure Fuel Line for Automotive Fuel Systems Engines (5/16 ID-10Ft)
ALLWIN$10.97700 rev
HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.
HOUSUN$11.231,790 rev
HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR for Automotive Fuel Systems Engines.
HOUSUN$9.261,790 rev
Trending
90-day click momentumHOUSUN Fuel Line 5/16 Inch ID Fuel Hose 5FT J30R7 Fuel Line Hose NBR.
HOUSUN$6.644.6★
HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.
HOUSUN$11.234.6★
mycheng 5/16 Fuel Line NBR Rubber SAE 30R7 25FT 300PSI Hose
mycheng$29.514.4★
5/16 Inch (8mm) ID Fuel Line Hose 10 FT 302PSI Push Lock NBR Rubber Hose for Automotive
Eunice$9.054.6★
HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 5FT J30R7 Fuel Line Hose NBR with 4 Clamps.
HOUSUN$7.964.6★
What buyers say about 5/16 fuel line
What buyers praise and complain about, mined from review topics.What buyers love
“Looks like good quality fuel line”
“***They do the trick*** Good fuel line”
“Great value”
“As Advertised”
“fits up nicely with new clamps”
“Works fine”
“Decent quality, very flexible”
“Worked great, added a second fuel line to rv generator”
“Hose worked as designed regarding no leaks”
“it has held up for 2 years”
What buyers complain about
“Ruptured in a week”
“garbage danger”
“Became brittle and leaks after short time”
“Did not hold the pressure”
“clamps are trash”
“Wrong size clamps”
“Wrong size clamps”
“Mismarked”
“expensive”
“This fuel line is terrible”
Top return reasons
Common questions
- Is 5/16 fuel line profitable to sell on Amazon United States?
- The niche generates $575K/yr across 14 tracked products. 90-day search growth is +21.1%. Flapen's verdict: Worth a look (56/100).
- How competitive is the 5/16 fuel line niche?
- 10 brands and 13 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 83% of demand.
- What do buyers complain about in 5/16 fuel line?
- Top complaints mined from reviews: Durability, Quality-Overall, Leak-Proof. The return rate is 1.4%.
- When does demand for 5/16 fuel line peak?
- Demand peaks in May; the busiest month runs 1.7× the quietest.
- What does it cost to enter the 5/16 fuel line niche?
- Listings span $6.64–$43.57; the average listing price is $16.57 (sweet spot $15–$100). The average incumbent carries 1,429 reviews — the moat a new listing must climb.