Is ngk cmr6h profitable to sell on Amazon United States?

The niche generates $202K/yr across 13 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +67.5%. Flapen's verdict: Worth a look (55/100).

How competitive is the ngk cmr6h niche?

8 brands and 56 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 91% of demand.

What do buyers complain about in ngk cmr6h?

Top complaints mined from reviews: Quality-Overall, Size-Overall, Defective Material/Parts. The return rate is 0.8%.

When does demand for ngk cmr6h peak?

Demand peaks in Apr–May–Jun; the busiest month runs 2.9× the quietest.

What does it cost to enter the ngk cmr6h niche?

Listings span $4.18–$45.40; the average listing price is $14.27 (sweet spot $15–$100). The average incumbent carries 570 reviews — the moat a new listing must climb.

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.

Conversion

Incredible21.6%

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

Returns

Incredible0.8%

return rate — above 5% 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

Good570

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

Bad91%

top-5 brand share — brand-locked demand

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad81%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, ngk cmr6h is a $202K/yr Amazon United States market (66K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Apr–May–Jun. Verdict: Worth a look — 55/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

ngk cmr6h market data

Units sold / yr: 13K–15K; avg 1,000–1,250/product
Revenue / yr: $178K–$214K; units × avg price
Conversion rate: 21.6%
Avg BSR: #358
Page quality: 0%
Prime: 92%
Sponsored: 62%
Out of stock: 0.6%
Avg brand age: 54 months
Avg seller age: 165 days

Competition & brand share

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

Brands

8 falling

Sellers

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

81%

Top 20: 100%

Open market

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

Demand & seasonality

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

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

Open Trend

Top ngk cmr6h search terms

ngk cmr6h22K/yr +98.5%15.9% conv.
ngk cmr6h spark plug18K/yr +47.8%19.5% conv.
cmr6h spark plug15K/yr +37.6%16.6% conv.
cmr6h6K/yr +53.2%12.0% conv.
ngk cmr6h spark plug stihl4K/yr +119.0%19.4% conv.

All search terms

Top ngk cmr6h 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.

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

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$9.704.4★122 rev

Midwest Engine NGK Carded Spark Plug NGK CMR6H ea 1 (130-212)

NGK$7.524.8★440 rev

NGK Pair Set Of 2 Universal Spark Plugs 3365 / CMR6H

Newparts$12.864.8★185 rev

NGK (3365) CMR6H Spark Plug - Pack of 4

NGK$19.294.8★761 rev

Hipa CMR6H Spark Plug for NGK 3365 Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)

Hipa$10.944.8★223 rev

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

NGK$29.871 rev

3mo ago

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$4.183 rev

5mo ago

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$7.9327 rev

1y ago

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$9.70122 rev

1y ago

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$15.1544 rev

2y ago

What buyers say about ngk cmr6h

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

What buyers love

Size-Overall25%

“Fit great”

Quality-Overall24%

“Great product”

Advertised Vs Actual Product16%

“They worked as advertised”

Socket/Port/Plug15%

“Perfect replacement spark plugs”

Value For Money12%

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

Blower3%

“This was good for my blower”

Efficiency3%

“works great”

Motor Power1%

“engine ran fine”

Assembly/Installation1%

“Right one easy install”

What buyers complain about

Quality-Overall30%

“Garbage”

Size-Overall20%

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

Defective Material/Parts20%

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

Maintenance And Repair10%

“Not a good replacement”

Durability10%

“Fowled out in 2 days”

Functionality-Overall10%

“Equipment wouldnt run”

Top return reasons

Size-Overall57%

Advertised Vs Actual Product25%

Compatibility-Overall8%

Functionality-Overall3%

Value For Money3%

Socket/Port/Plug2%

Defective Material/Parts2%

Quality-Overall2%

Flammable1%

Common questions

Is ngk cmr6h profitable to sell on Amazon United States?: The niche generates $202K/yr across 13 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +67.5%. Flapen's verdict: Worth a look (55/100).
How competitive is the ngk cmr6h niche?: 8 brands and 56 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 91% of demand.
What do buyers complain about in ngk cmr6h?: Top complaints mined from reviews: Quality-Overall, Size-Overall, Defective Material/Parts. The return rate is 0.8%.
When does demand for ngk cmr6h peak?: Demand peaks in Apr–May–Jun; the busiest month runs 2.9× the quietest.
What does it cost to enter the ngk cmr6h niche?: Listings span $4.18–$45.40; the average listing price is $14.27 (sweet spot $15–$100). The average incumbent carries 570 reviews — the moat a new listing must climb.