---
title: "Reviews — spark plugs - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/spark-plugs/reviews"
last_updated: "2026-08-09T23:05:15.915Z"
locale: en
meta:
  description: "Niche score 57/100 · $12.6M/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 57/100 · $12.6M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — spark plugs - Flapen"
---

# **spark plugs**

**Worth a look**

Shows a $12.6M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 100Growth 19Conversion 33Competition 88Returns 39Price range 53Avg price 94Brand share 56Review moat 57Quality gap 28

**Market size**

**Incredible****$12.6M**

$12.6M/yr · 10.3M searches

**Avg price**

**Great****$46.82**

avg listing price — sweet spot $15–$100

**Competition**

**Great****27%**

top-5 click share — an open shelf

**Review moat**

**Good****1,236.24**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Good****71%**

top-5 brand share — brands hold most of the demand

**Price range**

**Good****$3.28–$164.27**

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

**Returns**

**Okay****3.9%**

return rate — above 5% kills the launch gate

**Conversion**

**Okay****2.6%**

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

**Quality gap**

**Okay****4.6★**

avg incumbent rating — lower means beatable quality

**Growth**

**Bad****-12.5%**

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

## Reviews