---
title: "Reviews — ninja 400 exhaust - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/ninja-400-exhaust/reviews"
last_updated: "2026-08-06T20:21:29.954Z"
locale: en
meta:
  description: "Niche score 43/100 · $9K/yr market · 12K searches/yr · $55.73 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 43/100 · $9K/yr market · 12K searches/yr · $55.73 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — ninja 400 exhaust - Flapen"
---

# **ninja 400 exhaust**

**Skip it**

A small market ($9K/yr) — this niche doesn't clear our bar today.

Market size 2Growth 58Conversion 17Competition 30Returns 16Price range 80Avg price 91Brand share 46Review moat 94Quality gap 83

**Review moat**

**Great****114.65**

avg incumbent reviews — the moat a new listing must climb

**Avg price**

**Great****$55.73**

avg listing price — sweet spot $15–$100

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Price range**

**Great****$24.82–$117.35**

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

**Growth**

**Good****+32.6%**

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

**Brand share**

**Okay****77%**

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

**Competition**

**Okay****67%**

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

**Conversion**

**Bad****1.4%**

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

**Returns**

**Bad****7.6%**

return rate — above 5% kills the launch gate

**Market size**

**Bad****$9K**

$9K/yr · 12K searches

**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")

## Reviews