---
title: "Trend — spark plug cleaner - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/spark-plug-cleaner/trend"
last_updated: "2026-08-09T19:27:38.906Z"
locale: en
meta:
  description: "Niche score 58/100 · $84K/yr market · 67K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 58/100 · $84K/yr market · 67K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Trend — spark plug cleaner - Flapen"
---

# **spark plug cleaner**

**Worth a look**

Shows a sweet-spot price point ($24.57 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 21Growth 40Conversion 60Competition 33Returns 89Price range 95Avg price 95Brand share 66Review moat 94Quality gap 83

**Avg price**

**Incredible****$24.57**

avg listing price — sweet spot $15–$100

**Price range**

**Incredible****$14.95–$37.25**

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

**Review moat**

**Great****111.29**

avg incumbent reviews — the moat a new listing must climb

**Returns**

**Great****1.3%**

return rate — above 5% kills the launch gate

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Brand share**

**Good****65%**

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

**Conversion**

**Good****5.2%**

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

**Growth**

**Okay****+12.4%**

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

**Competition**

**Okay****65%**

top-5 click share — leaders hold, buyers still browse

**Market size**

**Bad****$84K**

$84K/yr · 67K searches

**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")

## Trend