---
title: "Lf3970 — $101K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/lf3970"
last_updated: "2026-08-10T04:07:22.474Z"
locale: en
meta:
description: "Niche score 51/100 · $101K/yr market · 13K searches/yr. Brand-locked demand (top 5 brands take 93% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · $101K/yr market · 13K searches/yr. Brand-locked demand (top 5 brands take 93% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Lf3970 — $101K/yr Amazon US Niche (2026) - Flapen"
---
# **lf3970**
**Worth a look**
Shows searches that convert (16.5% search→purchase), but brand-locked demand (top 5 brands take 93% of clicks) keeps it on the watch list.
Market size 25Growth 53Conversion 98Competition 22Returns 96Price range 60Avg price 94Brand share 18Review moat 96Quality gap 27
**Conversion**
**Incredible****16.5%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Incredible****72.21**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$46.70**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$19.68–$154.23**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Good****+25.0%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$101K**
$101K/yr · 13K searches
**Competition**
**Bad****74%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, lf3970 is a $101K/yr Amazon United States market (13K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Apr. Verdict: Worth a look — 51/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **lf3970 market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$93K–$117K**
- units × avg price
- **Conversion rate**
- **16.5%**
- **Avg BSR**
- **#1,468**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **64%**
- **Out of stock**
- **5.3%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▲rising
**Sellers**
**34**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**74%**
Top 20: 100%
**Open market**
**4%**
- Fleetguard66% - ATRACYPART15% - EMINENTGLOW6% - GETOPAUTO4% - PEIYAOTCO3% - CFKIT3% - Open — no brand owns it (2 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 97 weeks — +25.0% search growth over the last 90 days.
400300Spike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/us/automotive/lf3970/trend)
## **Top lf3970 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%$10K20%$20K30%$30K40%$40K1101001K 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**Fleetguard Oil Filter LF3970 Cummins ISB Engine (Pack of 2)**Fleetguard**$33.55**4.7★309 rev](https://www.amazon.com/dp/B071S941XG) [2**Fleetguard LF3970 Cummins Filtration Oil Filter 1-Pack**Fleetguard**$19.74**4.6★440 rev](https://www.amazon.com/dp/B000P4ZDTO) [3**LF3970 Fleetguard Lube Filter (Pack of 4)**Fleetguard**$63.95**4.5★21 rev](https://www.amazon.com/dp/B07WVSJTYJ) [4**LF3970 Oil Filter Compatible with Cummins ISB QSB 5.9L/6.7L Diesel Engine Replaces P550428 P551019 3937736 3937144 B7177 (6 Pack)**ATRACYPART**$49.59**4.6★58 rev](https://www.amazon.com/dp/B0DHGYLJBC) [5**LF3970 Oil/Lube Filter Compatible With Replaces Cummins QSB 5.9L 6.7L ISB Engine Replaces P550428 P551019 3937736 3937144 B7177 Set Of 6**EMINENTGLOW**$50.66**5.0★1 rev](https://www.amazon.com/dp/B0FWS48S45)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**LF3970 Oil/Lube Filter Compatible With Replaces Cummins QSB 5.9L 6.7L ISB Engine Replaces P550428 P551019 3937736 3937144 B7177 Set Of 6**EMINENTGLOW**$50.66**1 rev8mo ago](https://www.amazon.com/dp/B0FWS48S45) [**LF3970 Oil Filter Compatible with Cummins ISB QSB 5.9L/6.7L Diesel Engine Replaces P550428 P551019 3937736 3937144 B7177 (2 Pack)**ATRACYPART**$20.91**58 rev1y ago](https://www.amazon.com/dp/B0DK8H68TY) [**LF3970 Oil Filter Compatible with Cummins ISB QSB 5.9L/6.7L Diesel Engine Replaces P550428 P551019 3937736 3937144 B7177 (6 Pack)**ATRACYPART**$49.59**58 rev1y ago](https://www.amazon.com/dp/B0DHGYLJBC) [**LF3970 Oil Filter Compatible with Cummins ISB QSB 5.9L/6.7L Diesel Engine Replaces P550428 P551019 3937736 3937144 B7177 (4 Pack)**ATRACYPART**$38.78**58 rev1y ago](https://www.amazon.com/dp/B0DK8DYYTX) [**LF3970 Oil Filter Fits for Cummins QSB ISB engines 3937736 5404947 Replacement For 3937736 3937144 B7177 P550428 Fits For QSB5.9L/6.7L ISB07 6.7L Diesel Engines(Set of 6)**ZELYVER**$55.40**2 rev1y ago](https://www.amazon.com/dp/B0DL9Z7XP9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**LF3970 Fleetguard Lube Filter Replaces (Donaldson P550428 P551019)**Fleetguard**$20.68**5.0★**▲ 245%**](https://www.amazon.com/dp/B07WQRTWGW) [**LF3970 Oil/Lube Filter Compatible With Replaces Cummins QSB 5.9L 6.7L ISB Engine Replaces P550428 P551019 3937736 3937144 B7177 Set Of 6**EMINENTGLOW**$50.66**5.0★**▲ 120%**](https://www.amazon.com/dp/B0FWS48S45) [**LF3970 Oil Filter Fits for Cummins QSB ISB engines 3937736 5404947 Replacement For 3937736 3937144 B7177 P550428 Fits For QSB5.9L/6.7L ISB07 6.7L Diesel Engines(Set of 6)**ZELYVER**$55.40**4.0★**▲ 80%**](https://www.amazon.com/dp/B0DL9Z7XP9) [**LF3970 Oil Filter Compatible with Cummins ISB QSB 5.9L/6.7L Diesel Engine Replaces P550428 P551019 3937736 3937144 B7177 (6 Pack)**ATRACYPART**$49.59**4.6★**▲ 56%**](https://www.amazon.com/dp/B0DHGYLJBC) [**LF3970 Oil Filter Compatible with Cummins ISB QSB 5.9L/6.7L Diesel Engine Replaces P550428 P551019 3937736 3937144 B7177 (2 Pack)**ATRACYPART**$20.91**4.6★**— 8%**](https://www.amazon.com/dp/B0DK8H68TY)
**~~View all trending →~~**
## **What buyers say about lf3970**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**33%
*“Items as described”*
**Value For Money**33%
*“Very fair price”*
**Quality-Overall**17%
*“Good quality”*
**Lubrication**8%
*“Works well i change oil frequently so these are a good price point”*
**Efficiency**8%
*“Works great”*
### **What buyers complain about **
**Filtration**33%
*“Today, I needed one, and discovered after an hour of unending frustration that NONE of the four filters I purchased fits onto my 2006 Ram with 5.9l Cummins engine”*
**Compatibility-Overall**33%
*“Does not fit 6.7l cummins”*
**Advertised Vs Actual Product**17%
*“Poor advertising as it stated it was a direct fit to my truck”*
**Size-Overall**17%
*“did not fit truck”*
### **Top return reasons **
**Size-Overall**39%
**Filtration**30%
**Compatibility-Overall**10%
**Advertised Vs Actual Product**9%
**Value For Money**6%
**Defective Material/Parts**4%
**Motor Issues**2%
**Assembly/Installation**2%
## **Common questions**
- **Is lf3970 profitable to sell on Amazon United States?**
- The niche generates $101K/yr across 14 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +25.0%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the lf3970 niche?**
- 8 brands and 34 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in lf3970?**
- Top complaints mined from reviews: Filtration, Compatibility-Overall, Advertised Vs Actual Product. The return rate is 0.9%.
- **When does demand for lf3970 peak?**
- Demand peaks in Apr; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the lf3970 niche?**
- Listings span $19.68–$154.23; the average listing price is $46.70 (sweet spot $15–$100). The average incumbent carries 72 reviews — the moat a new listing must climb.
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