chevy 350 spark plugs
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$21.67avg listing price — sweet spot $15–$100
Conversion
Great9.4%search→purchase rate — share of searches ending in a sale
Returns
Good2.1%return rate — above 6% kills the launch gate
Review moat
Good788.25avg incumbent reviews — the moat a new listing must climb
Growth
Good+36.2%90-day search growth — must beat 0% to launch
Price range
Good$2.54–$30.02cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$25K$25K/yr · 12K searches
Competition
Bad100%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Competition
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
2 falling
Sellers
30
Top-5 brand share
100%
Open market
0%
- 1A Auto51%
- ACDelco49%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 4 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Newest
by launch dateDemand & seasonality
Weekly Amazon search volume, last 53 weeks — +36.2% search growth over the last 90 days.Peak months: Apr, May · busiest ÷ quietest = 2.3×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“As advertised”
“Good plugs”
“Good fit”
“They are cheaper than autozone”
“excellent quality replacement”
“Installation was straightforward, and after installing them my Chevy K10 started easily, idled smoothly, and ran great”