---
title: "Reviews — 5.7 hemi spark plugs - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/5-7-hemi-spark-plugs/reviews"
last_updated: "2026-08-09T15:17:51.077Z"
locale: en
meta:
  description: "Niche score 41/100 · $91K/yr market · 45K searches/yr · $116.82 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 41/100 · $91K/yr market · 45K searches/yr · $116.82 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — 5.7 hemi spark plugs - Flapen"
---

# **5.7 hemi spark plugs**

**Skip it**

Weak search conversion (1.7%) — this niche doesn't clear our bar today.

Market size 23Growth 25Conversion 22Competition 47Returns 59Price range 29Avg price 69Brand share 53Review moat 87Quality gap 43

**Review moat**

**Great****262.04**

avg incumbent reviews — the moat a new listing must climb

**Avg price**

**Good****$116.82**

avg listing price — sweet spot $15–$100

**Returns**

**Good****2.6%**

return rate — above 5% kills the launch gate

**Brand share**

**Good****73%**

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

**Competition**

**Okay****57%**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Price range**

**Okay****$9.23–$297.49**

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

**Growth**

**Bad****-0.9%**

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

**Market size**

**Bad****$91K**

$91K/yr · 45K searches

**Conversion**

**Bad****1.7%**

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

**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")

## Reviews