---
title: "5/16 Fuel Line — $575K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/5-16-fuel-line"
last_updated: "2026-08-09T14:12:21.112Z"
locale: en
meta:
description: "Niche score 56/100 · $575K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $575K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "5/16 Fuel Line — $575K/yr Amazon US Niche (2026) - Flapen"
---
# **5/16 fuel line**
**Worth a look**
Shows searches that convert (15.5% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 63Growth 51Conversion 97Competition 25Returns 88Price range 77Avg price 79Brand share 37Review moat 52Quality gap 27
**Conversion**
**Incredible****15.5%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Great****1.4%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$16.57**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$6.64–$43.57**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$575K**
$575K/yr · 224K searches
**Review moat**
**Good****1,428.5**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Good****+21.1%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****70%**
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 ~~](https://flapen.com/research/methodology)
## **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.
5K3KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/automotive/5-16-fuel-line/trend)
## **Top 5/16 fuel line search terms**
- **5/16 fuel line**156K/yr+23.1%13.6% conv. - **5/16 fuel hose**25K/yr+14.1%14.5% conv. - **8mm fuel line**8K/yr+18.8%6.7% conv. - **5/16 id fuel line**6K/yr+23.9%8.1% conv. - **fuel line 5/16**6K/yr+25.4%10.7% conv. - **5/16 fuel injection hose**5K/yr+12.4%8.7% conv. - **5 16 fuel line**5K/yr+29.4%9.6% conv. - **5/16 fuel line hose**3K/yr-21.5%14.2% conv. - **fuel hose 5/16**3K/yr+22.4%13.2% conv. - **5/15 fuel line**3K/yr+8.0%11.6% conv. [**All search terms **](https://flapen.com/research/us/automotive/5-16-fuel-line/search-terms)
## **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.
0%10%$58K20%$115K30%$173K40%$230K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**5/16 Inch (8mm) ID Fuel Line Hose 10FT NBR Rubber Push Lock Hose High Pressure 300PSI for Automotive Fuel Systems Engines**dojobkinb**$10.61**4.6★5,527 rev](https://www.amazon.com/dp/B09KRVK9M9) [2**HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.**HOUSUN**$11.23**4.6★1,790 rev](https://www.amazon.com/dp/B0CNC11L62) [3**5/16 ID Fuel Line Hose SAE 30R7 150 psi 25 Length Fuel Hose**CMOOD**$24.04**4.6★745 rev](https://www.amazon.com/dp/B09ZJ1W4WK) [4**EVIL ENERGY 5/16 Fuel Hose Line Push Lock NBR Rubber SAE 30R7 10FT 300PSI**EVIL ENERGY**$22.78**4.8★2,325 rev](https://www.amazon.com/dp/B097HDNLRM) [5**5/16 Inch (8mm) ID Fuel Line Hose 10 FT 302PSI Push Lock NBR Rubber Hose for Automotive**Eunice**$9.05**4.6★1,837 rev](https://www.amazon.com/dp/B09MTGFWKN)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**mycheng 5/16 Fuel Line NBR Rubber SAE 30R7 25FT 300PSI Hose**mycheng**$29.51**19 rev1y ago](https://www.amazon.com/dp/B0F1CJGCM9) [**ZONBANG 5/16 Fuel Line NBR Rubber 5/16 Fuel Hose Nylon Braided Fuel Line Hose for Automotive Vehicles(5FT)**ZONBANG**$6.77**324 rev1y ago](https://www.amazon.com/dp/B0DN6GTLFZ) [**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**$10.97**700 rev1y ago](https://www.amazon.com/dp/B0D97W75HT) [**HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.**HOUSUN**$11.23**1,790 rev2y ago](https://www.amazon.com/dp/B0CNC11L62) [**HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR for Automotive Fuel Systems Engines.**HOUSUN**$9.26**1,790 rev2y ago](https://www.amazon.com/dp/B0CFYN9YG8)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 5FT J30R7 Fuel Line Hose NBR.**HOUSUN**$6.64**4.6★**▲ 83%**](https://www.amazon.com/dp/B0CS2786TR) [**HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.**HOUSUN**$11.23**4.6★**▲ 46%**](https://www.amazon.com/dp/B0CNC11L62) [**mycheng 5/16 Fuel Line NBR Rubber SAE 30R7 25FT 300PSI Hose**mycheng**$29.51**4.4★**▲ 35%**](https://www.amazon.com/dp/B0F1CJGCM9) [**5/16 Inch (8mm) ID Fuel Line Hose 10 FT 302PSI Push Lock NBR Rubber Hose for Automotive**Eunice**$9.05**4.6★**▲ 32%**](https://www.amazon.com/dp/B09MTGFWKN) [**HOUSUN Fuel Line 5/16 Inch ID Fuel Hose 5FT J30R7 Fuel Line Hose NBR with 4 Clamps.**HOUSUN**$7.96**4.6★**▲ 31%**](https://www.amazon.com/dp/B0CRZCP3CJ)
**~~View all trending →~~**
## **What buyers say about 5/16 fuel line**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**32%
*“Looks like good quality fuel line”*
**Fuel Efficiency**18%
*“***They do the trick*** Good fuel line”*
**Value For Money**16%
*“Great value”*
**Advertised Vs Actual Product**11%
*“As Advertised”*
**Size-Overall**8%
*“fits up nicely with new clamps”*
**Efficiency**5%
*“Works fine”*
**Flexibility**4%
*“Decent quality, very flexible”*
**Motor Power**2%
*“Worked great, added a second fuel line to rv generator”*
**Leak-Proof**2%
*“Hose worked as designed regarding no leaks”*
**Durability**1%
*“it has held up for 2 years”*
### **What buyers complain about **
**Durability**26%
*“Ruptured in a week”*
**Quality-Overall**15%
*“garbage danger”*
**Leak-Proof**13%
*“Became brittle and leaks after short time”*
**Pressure**9%
*“Did not hold the pressure”*
**Adhesion/Stickiness**5%
*“clamps are trash”*
**Mounting**4%
*“Wrong size clamps”*
**Size-Overall**4%
*“Wrong size clamps”*
**Advertised Vs Actual Product**4%
*“Mismarked”*
**Value For Money**3%
*“expensive”*
**Fuel Efficiency**3%
*“This fuel line is terrible”*
### **Top return reasons **
**Size-Overall**67%
**Compatibility-Overall**4%
**Quality-Overall**3%
**Advertised Vs Actual Product**3%
**Certifications**3%
**Pressure**3%
**Fuel Efficiency**2%
**Defective Material/Parts**2%
**Functionality-Overall**2%
**Thickness**2%
## **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.
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