---
title: "Ls Steam Vent Kit — $147K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/ls-steam-vent-kit"
last_updated: "2026-08-07T16:47:38.502Z"
locale: en
meta:
description: "Niche score 52/100 · $147K/yr market · 68K searches/yr · $45.84 avg price. Soft demand (-0.1% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $147K/yr market · 68K searches/yr · $45.84 avg price. Soft demand (-0.1% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Ls Steam Vent Kit — $147K/yr Amazon US Niche (2026) - Flapen"
---
# **ls steam vent kit**
**Worth a look**
Shows a thin review moat (88 avg reviews), but soft demand (-0.1% this quarter) keeps it on the watch list.
Market size 32Growth 25Conversion 56Competition 48Returns 47Price range 50Avg price 95Brand share 57Review moat 96Quality gap 87
**Review moat**
**Incredible****88.18**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Incredible****$45.84**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****71%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Good****4.7%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****$13.44–$183.77**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Okay****56%**
top-5 click share — leaders hold, buyers still browse
**Returns**
**Okay****3.2%**
return rate — above 5% kills the launch gate
**Market size**
**Okay****$147K**
$147K/yr · 68K searches
**Growth**
**Bad****-0.1%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, ls steam vent kit is a $147K/yr Amazon United States market (68K searches/yr). The top 5 brands hold 71% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ls steam vent kit market data**
- **Units sold / yr**
- **3K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$115K–$138K**
- units × avg price
- **Conversion rate**
- **4.7%**
- **Avg BSR**
- **#253**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **95%**
- **Out of stock**
- **6.3%**
- **Avg brand age**
- **41 months**
- **Avg seller age**
- **178 days**
## **Competition & brand share**
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▼falling
**Sellers**
**20**
**Top-5 brand share**
**71%**
Top 20: 100%
**Top-5 click share**
**56%**
Top 20: 98%
**Open market**
**21%**
- WnSEu20% - EVIL ENERGY17% - PQY15% - Nakkaa9% - Gxencks9% - Yokolos8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -0.1% search growth over the last 90 days.
2K1KHoliday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/automotive/ls-steam-vent-kit/trend)
## **Top ls steam vent kit search terms**
- **ls steam port kit**38K/yr-3.1%4.1% conv. - **ls steam vent kit**18K/yr-5.8%2.9% conv. - **ls coolant crossover**6K/yr+4.7%3.8% conv. - **ls steam port**5K/yr+35.6%3.9% conv. [**All search terms **](https://flapen.com/research/us/automotive/ls-steam-vent-kit/search-terms)
## **Top ls steam vent kit products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%4%$6K8%$12K12%$18K16%$23K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 22 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit Black Complete LS Steam Port Kit with Leak-Proof Seals Fits 6.0 5.3 LS1 LS2 LS3 LS6 LS7 LSX Engines**EVIL ENERGY**$100.94**4.2★41 rev](https://www.amazon.com/dp/B0F84Y1YSM) [2**PQY LS Coolant Crossover Steam Vent Kit 4 Port Complete LS Steam Port Kit for 6.0 5.3 LS1 LS2 LS3 LS6 LS7 LS9 LSX Silver**PQY**$34.04**3.2★135 rev](https://www.amazon.com/dp/B0BVVJ4VX2) [3**Nakkaa Steam Vent Hose Kit -4 AN Complete Coolant Crossover Compatible with LSX LS1 LS2 LS6 LM7 Engine Steam Hoses**Nakkaa**$36.67**3.8★34 rev](https://www.amazon.com/dp/B0C16DK18X) [4**MSCRP AN4 Fuel Brake Line LS Coolant Crossover Steam Vent Kit LS Stainless Coolant Crossover Steam Vent Kit Compatible with for LS1 LS2 LS3 LS6 LS7 LS9 LSX**WnSEu**$34.27**3.7★226 rev](https://www.amazon.com/dp/B0CJ94XNF1) [5**Gxencks Black Pro Suit LS Coolant/Steam Port For All GM LS series engines LS Throttle Body Bypass Hose kit**Gxencks**$27.03**4.2★77 rev](https://www.amazon.com/dp/B0DGXLMX7T)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**AN4 LS Coolant Crossover Steam Vent Kit LS 4 Port Stainless Steam Line Kit | Fit for LS 4 Port Steam Vent Engine LS1 LS2 LS3 LS6 LS7 LS9 LSX**LLNSEAUTO**$32.21**1 rev2mo ago](https://www.amazon.com/dp/B0GXTV1FBD) [**EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit Black Complete LS Steam Port Kit with Leak-Proof Seals Fits 6.0 5.3 LS1 LS2 LS3 LS6 LS7 LSX Engines**EVIL ENERGY**$100.94**41 rev11mo ago](https://www.amazon.com/dp/B0F84Y1YSM) [**EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit Red Complete LS Steam Port Kit with Leak-Proof Seals Fits 6.0 5.3 LS1 LS2 LS3 LS6 LS7 LSX Engines**EVIL ENERGY**$101.77**41 rev11mo ago](https://www.amazon.com/dp/B0F84JJ55H) [**Cosmostar 1-1/4 Radiator Hose Barb Coupler Adapter with 1/8 NPT Steam Port for LS Swap Aluminum Coolant Crossover Splice for Steam Vent Radiator Hose Fitting (Black)-NN17N02**HE COSMOSTAR**$17.17**61 rev1y ago](https://www.amazon.com/dp/B0F9F9X7N3) [**Stainless Steel Coolant Crossover LS Steam Vent Kit for LS1 LS2 LS3 LS6 LS7 LSX Engines Compatible with Holley Hi Ram/Sniper Edelbrock Pro-Flo XT/Victor Jr Gen 3 Truck Intakes**broyear**$36.69**8 rev1y ago](https://www.amazon.com/dp/B0F8HBY8TD)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AN4 LS Coolant Crossover Steam Vent Kit LS 4 Port Stainless Steam Line Kit | Fit for LS 4 Port Steam Vent Engine LS1 LS2 LS3 LS6 LS7 LS9 LSX**LLNSEAUTO**$32.21**5.0★**▲ 289%**](https://www.amazon.com/dp/B0GXTV1FBD) [**MSCRP LS Cylinder Head Coolant Steam Port Crossover Body Bypass Hose Kit Compatible with All GM LS Series LS1 LSX LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 Engines**WnSEu**$20.44**4.6★**▲ 76%**](https://www.amazon.com/dp/B099PBXPD5) [**PQY LS Throttle Body Bypass Hose kit LS Coolant Steam Port Crossover Hose Kits with Tape**PQY**$22.88**4.5★**▲ 69%**](https://www.amazon.com/dp/B09CPXY336) [**Stainless Steel Coolant Crossover LS Steam Vent Kit for LS1 LS2 LS3 LS6 LS7 LSX Engines Compatible with Holley Hi Ram/Sniper Edelbrock Pro-Flo XT/Victor Jr Gen 3 Truck Intakes**broyear**$36.69**4.6★**▲ 60%**](https://www.amazon.com/dp/B0F8HBY8TD) [**EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit Black Complete LS Steam Port Kit with Leak-Proof Seals Fits 6.0 5.3 LS1 LS2 LS3 LS6 LS7 LSX Engines**EVIL ENERGY**$100.94**4.2★**▲ 54%**](https://www.amazon.com/dp/B0F84Y1YSM)
**~~View all trending →~~**
## **What buyers say about ls steam vent kit**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**26%
*“Good fit”*
**Quality-Overall**23%
*“Good quality, easy install”*
**Leak-Proof**13%
*“Works well and don't leak”*
**Value For Money**10%
*“Good kit for the Value”*
**Material Quality**5%
*“It's a good quality aluminum”*
**Efficiency**5%
*“Works pretty good”*
**Design-Overall**4%
*“Other than that it seems to be a well built piece”*
**Assembly/Installation**3%
*“Good quality, easy install”*
**Functionality-Overall**3%
*“It worked fine for me”*
**Advertised Vs Actual Product**2%
*“Just as described”*
### **What buyers complain about **
**Size-Overall**29%
*“one was split the other simply too long”*
**Leak-Proof**18%
*“Do not know if it will leak as others have stated”*
**Assembly/Installation**16%
*“its annoying to put together”*
**Quality-Overall**9%
*“Need better quality control”*
**Compatibility-Overall**8%
*“Did not fit my 5.7 ls1”*
**Instructions/User Manual/Troubleshooting**4%
*“Also no instructions”*
**Functionality-Overall**3%
*“Junk, it wouldn't work”*
**Connectivity-Overall**3%
*“Non threaded connection point”*
**Flexibility**2%
*“bends arent all the same”*
**Advertised Vs Actual Product**2%
*“does not match the advertised installation diagram”*
### **Top return reasons **
**Size-Overall**34%
**Defective Material/Parts**16%
**Compatibility-Overall**11%
**Functionality-Overall**6%
**Advertised Vs Actual Product**5%
**Coolant**5%
**Quality-Overall**4%
**Assembly/Installation**3%
**Leak-Proof**3%
**Value For Money**2%
## **Common questions**
- **Is ls steam vent kit profitable to sell on Amazon United States?**
- The niche generates $147K/yr across 22 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -0.1%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the ls steam vent kit niche?**
- 16 brands and 20 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 71% of demand.
- **What do buyers complain about in ls steam vent kit?**
- Top complaints mined from reviews: Size-Overall, Leak-Proof, Assembly/Installation. The return rate is 3.2%.
- **When does demand for ls steam vent kit peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the ls steam vent kit niche?**
- Listings span $13.44–$183.77; the average listing price is $45.84 (sweet spot $15–$100). The average incumbent carries 88 reviews — the moat a new listing must climb.
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