---
title: "ngk cmr6h — Niche Verdict: Worth a look (55/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/ngk-cmr6h"
last_updated: "2026-07-14T01:56:21.911Z"
locale: en
meta:
  description: "ngk cmr6h shows searches that convert (21.6% search→purchase), but a concentrated shelf (top 5 take 81% of clicks) keeps it on the watch list."
  "og:description": "ngk cmr6h shows searches that convert (21.6% search→purchase), but a concentrated shelf (top 5 take 81% of clicks) keeps it on the watch list."
  "og:title": "ngk cmr6h — Niche Verdict: Worth a look (55/100) | Amazon United States - Flapen"
---

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# **ngk cmr6h**

**Worth a look**

Shows searches that convert (21.6% search→purchase), but a concentrated shelf (top 5 take 81% of clicks) keeps it on the watch list.

Market size 40Growth 78Conversion 100Competition 16Returns 96Price range 74Avg price 69Brand share 23Review moat 73Quality gap 21

**Conversion**

**Incredible****21.6%**

search→purchase rate — share of searches ending in a sale

**Returns**

**Incredible****0.8%**

return rate — above 6% kills the launch gate

**Growth**

**Great****+67.5%**

90-day search growth — must beat 0% to launch

**Price range**

**Good****$4.18–$45.40**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Review moat**

**Good****570**

avg incumbent reviews — the moat a new listing must climb

**Avg price**

**Good****$14.27**

avg listing price — sweet spot $15–$100

**Market size**

**Okay****$202K**

$202K/yr · 66K searches

**Brand share**

**Bad****91%**

top-5 brand share — brand-locked demand

**Quality gap**

**Bad****4.7★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****81%**

top-5 click share — a locked-up shelf

## **Competition**

The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**8 **▼falling

**Sellers**

**56**

**Top-5 brand share**

**91%**

**Open market**

**6%**

- NGK34% - Wetenex27% - Newparts18% - Hipa7% - Atunee4% - HAISHINE4% - Open — no brand owns it (2 brands, 6%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$20K20%$40K30%$61K40%$81K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![CMR6H Spark plug for NGK CMR6H 3365 Champion RZ7C STHIL FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 BR600 4 MIX Trimmer Chainsaw 2 PACK](https://m.media-amazon.com/images/I/41mXOx+HQeL.jpg)**CMR6H Spark plug for NGK CMR6H 3365 Champion RZ7C STHIL FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 BR600 4 MIX Trimmer Chainsaw 2 PACK**Wetenex**$9.70**4.4★122 rev](https://www.amazon.com/dp/B0DSVHH7R5) [2![Midwest Engine NGK Carded Spark Plug NGK CMR6H ea 1 (130-212)](https://m.media-amazon.com/images/I/31RG-lWKAlL.jpg)**Midwest Engine NGK Carded Spark Plug NGK CMR6H ea 1 (130-212)**NGK**$7.52**4.8★440 rev](https://www.amazon.com/dp/B002Y33QHK) [3![NGK Pair Set Of 2 Universal Spark Plugs 3365 / CMR6H](https://m.media-amazon.com/images/I/41mmEDBS9eL.jpg)**NGK Pair Set Of 2 Universal Spark Plugs 3365 / CMR6H**Newparts**$12.86**4.8★185 rev](https://www.amazon.com/dp/B09JZGXWZC) [4![NGK (3365) CMR6H Spark Plug - Pack of 4](https://m.media-amazon.com/images/I/41BSKZ9g6VL.jpg)**NGK (3365) CMR6H Spark Plug - Pack of 4**NGK**$19.29**4.8★761 rev](https://www.amazon.com/dp/B00BP31TJW) [5![Hipa CMR6H Spark Plug for NGK 3365 Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)](https://m.media-amazon.com/images/I/51NJSIj+rwL.jpg)**Hipa CMR6H Spark Plug for NGK 3365 Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)**Hipa**$10.94**4.8★223 rev](https://www.amazon.com/dp/B0BD499RZQ)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![NGK CMR6H - OE Standard Series Spark Plugs - 3365 - Compatible with select Stihl Kombi Jonsered Poulan Pro Chain Saws and Outdoor Power Equipment - Qty 6](https://m.media-amazon.com/images/I/51oQ6dYMJsL.jpg)**NGK CMR6H - OE Standard Series Spark Plugs - 3365 - Compatible with select Stihl Kombi Jonsered Poulan Pro Chain Saws and Outdoor Power Equipment - Qty 6**NGK**$29.87**1 rev3mo ago](https://www.amazon.com/dp/B0H1SSVK1V) [![Yistiun CMR6H Spark plug for NGK CMR6H 3365 for Champion RZ7C for STHIL FS40 FS56 FS90 FS100 FS110 HL90 HL100 HL110 HT100 KM90 KM110 KM130 4 MIX Trimmer BR600 BG56 BG66 Blower MS181 MS211 Chainsaw](https://m.media-amazon.com/images/I/41ticgtkISL.jpg)**Yistiun CMR6H Spark plug for NGK CMR6H 3365 for Champion RZ7C for STHIL FS40 FS56 FS90 FS100 FS110 HL90 HL100 HL110 HT100 KM90 KM110 KM130 4 MIX Trimmer BR600 BG56 BG66 Blower MS181 MS211 Chainsaw**Yistiun**$4.18**3 rev5mo ago](https://www.amazon.com/dp/B0GKY9L7PJ) [![AZXX CMR6H Spark Plug 2 Pack for NGK 3365 CMR6H Spark Plugs for Champion RZ7C for Stihl FS40C FS56 FS56RC FS90R FS100 Trimmer Fit for NGK CMR6H Spark Plug BR600 BG56 BG66 Blower MS181 MS211 Chainsaw](https://m.media-amazon.com/images/I/417ekEkqqOL.jpg)**AZXX CMR6H Spark Plug 2 Pack for NGK 3365 CMR6H Spark Plugs for Champion RZ7C for Stihl FS40C FS56 FS56RC FS90R FS100 Trimmer Fit for NGK CMR6H Spark Plug BR600 BG56 BG66 Blower MS181 MS211 Chainsaw**AZXX**$7.93**27 rev1y ago](https://www.amazon.com/dp/B0F4MM4445) [![CMR6H Spark plug for NGK CMR6H 3365 Champion RZ7C STHIL FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 BR600 4 MIX Trimmer Chainsaw 2 PACK](https://m.media-amazon.com/images/I/41mXOx+HQeL.jpg)**CMR6H Spark plug for NGK CMR6H 3365 Champion RZ7C STHIL FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 BR600 4 MIX Trimmer Chainsaw 2 PACK**Wetenex**$9.70**122 rev1y ago](https://www.amazon.com/dp/B0DSVHH7R5) [![Atunee 12Pcs CMR6H Spark Plug Replace for NGK 3365 and Fit for Stihl FS90 FS100 FS110 HL90 HL110 HT100 KM90 BR500 BR550 BR600 Trimmer](https://m.media-amazon.com/images/I/41NqMK+x1nL.jpg)**Atunee 12Pcs CMR6H Spark Plug Replace for NGK 3365 and Fit for Stihl FS90 FS100 FS110 HL90 HL110 HT100 KM90 BR500 BR550 BR600 Trimmer**Atunee**$15.15**44 rev2y ago](https://www.amazon.com/dp/B0D2L36KT3)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Yistiun CMR6H Spark plug for NGK CMR6H 3365 for Champion RZ7C for STHIL FS40 FS56 FS90 FS100 FS110 HL90 HL100 HL110 HT100 KM90 KM110 KM130 4 MIX Trimmer BR600 BG56 BG66 Blower MS181 MS211 Chainsaw](https://m.media-amazon.com/images/I/41ticgtkISL.jpg)**Yistiun CMR6H Spark plug for NGK CMR6H 3365 for Champion RZ7C for STHIL FS40 FS56 FS90 FS100 FS110 HL90 HL100 HL110 HT100 KM90 KM110 KM130 4 MIX Trimmer BR600 BG56 BG66 Blower MS181 MS211 Chainsaw**Yistiun**$4.18**5.0★**▲ 170%**](https://www.amazon.com/dp/B0GKY9L7PJ) [![NGK CMR6H - OE Standard Series Spark Plugs - 3365 - Compatible with select Stihl Kombi Jonsered Poulan Pro Chain Saws and Outdoor Power Equipment - Qty 6](https://m.media-amazon.com/images/I/51oQ6dYMJsL.jpg)**NGK CMR6H - OE Standard Series Spark Plugs - 3365 - Compatible with select Stihl Kombi Jonsered Poulan Pro Chain Saws and Outdoor Power Equipment - Qty 6**NGK**$29.87**5.0★**▲ 167%**](https://www.amazon.com/dp/B0H1SSVK1V) [![Haishine 4 Pack CMR6H Spark Plugs NGK OEM Replacement Parts Fits for Stihl FS90 FS100 FS110 HL90 HL110 HT100 KM90 BR500 Trimmer Weedeater](https://m.media-amazon.com/images/I/41fdXFW+MZL.jpg)**Haishine 4 Pack CMR6H Spark Plugs NGK OEM Replacement Parts Fits for Stihl FS90 FS100 FS110 HL90 HL110 HT100 KM90 BR500 Trimmer Weedeater**HAISHINE**$8.99**4.4★**▲ 113%**](https://www.amazon.com/dp/B0CHP9FMX8) [![Hipa CMR6H Spark Plug for NGK 3365 Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)](https://m.media-amazon.com/images/I/51NJSIj+rwL.jpg)**Hipa CMR6H Spark Plug for NGK 3365 Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)**Hipa**$10.94**4.8★**▲ 51%**](https://www.amazon.com/dp/B0BD499RZQ) [![CMR6H Spark plug for NGK CMR6H 3365 Champion RZ7C STHIL FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 BR600 4 MIX Trimmer Chainsaw 2 PACK](https://m.media-amazon.com/images/I/41mXOx+HQeL.jpg)**CMR6H Spark plug for NGK CMR6H 3365 Champion RZ7C STHIL FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 BR600 4 MIX Trimmer Chainsaw 2 PACK**Wetenex**$9.70**4.4★**▲ 28%**](https://www.amazon.com/dp/B0DSVHH7R5)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — +67.5% search growth over the last 90 days.

3K2KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Apr, May, Jun · busiest ÷ quietest = 2.9×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**25%

*“Fit great”*

**Quality-Overall**24%

*“Great product”*

**Advertised Vs Actual Product**16%

*“They worked as advertised”*

**Socket/Port/Plug**15%

*“Perfect replacement spark plugs”*

**Value For Money**12%

*“These replacement plugs seem to be a good value as they are way cheaper than the big name brands”*

**Blower**3%

*“This was good for my blower”*

**Efficiency**3%

*“works great”*

**Motor Power**1%

*“engine ran fine”*

**Assembly/Installation**1%

*“Right one easy install”*

### **What buyers complain about **

**Quality-Overall**30%

*“Garbage”*

**Size-Overall**20%

*“The are smaller than any I have seen on a chainsaw”*

**Defective Material/Parts**20%

*“What is it about really small parts i purchase that takes weeks to get”*

**Maintenance And Repair**10%

*“Not a good replacement”*

**Durability**10%

*“Fowled out in 2 days”*

**Functionality-Overall**10%

*“Equipment wouldnt run”*

### **Top return reasons **

**Size-Overall**57%

**Advertised Vs Actual Product**25%

**Compatibility-Overall**8%

**Functionality-Overall**3%

**Value For Money**3%

**Socket/Port/Plug**2%

**Defective Material/Parts**2%

**Quality-Overall**2%

**Flammable**1%