---
title: "Carburetor Spacer — $84K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/carburetor-spacer"
last_updated: "2026-08-10T18:17:48.162Z"
locale: en
meta:
description: "Niche score 63/100 · $84K/yr market · 64K 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 63/100 · $84K/yr market · 64K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Carburetor Spacer — $84K/yr Amazon US Niche (2026) - Flapen"
---
# **carburetor spacer**
**Worth a look**
Shows a thin review moat (69 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 21Growth 46Conversion 51Competition 90Returns 42Price range 90Avg price 95Brand share 91Review moat 97Quality gap 73
**Review moat**
**Incredible****68.85**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Incredible****$31.86**
avg listing price — sweet spot $15–$100
**Brand share**
**Great****44%**
top-5 brand share — no brand owns this niche
**Competition**
**Great****25%**
top-5 click share — an open shelf
**Price range**
**Great****$12.04–$63.18**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****4.1%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Okay****+17.2%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****3.7%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$84K**
$84K/yr · 64K 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")
According to Flapen's Amazon United States niche tracking, carburetor spacer is a $84K/yr Amazon United States market (64K searches/yr). The top 5 brands hold 44% of demand. Verdict: Worth a look — 63/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **carburetor spacer market data**
- **Units sold / yr**
- **2K–3K**
- avg 0–100/product
- **Revenue / yr**
- **$64K–$80K**
- units × avg price
- **Conversion rate**
- **4.1%**
- **Avg BSR**
- **#1,403**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **71%**
- **Out of stock**
- **4.8%**
- **Avg brand age**
- **60 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
Clicks spread well past the top 5 (25% combined) — an open shelf where new products get seen.
**Brands**
**36 **▲rising
**Sellers**
**103**
**Top-5 brand share**
**44%**
Top 20: 84%
**Top-5 click share**
**25%**
Top 20: 58%
**Open market**
**52%**
- SHLPDFM12% - Edelbrock11% - TAKPART9% - uxcell7% - Zenymb6% - X-AVION4%
## **Demand**
Weekly Amazon search volume, last 14 weeks — +17.2% search growth over the last 90 days.
1K750Apr '26Apr '26May '26May '26May '26Jun '26Jun '26
[**Open Trend **](https://flapen.com/research/us/automotive/carburetor-spacer/trend)
## **Top carburetor spacer search terms**
- **carb spacer**16K/yr+12.1%3.3% conv. - **carburetor spacer**18K/yr-3.8%2.7% conv. - **phenolic carb spacer**8K/yr+35.5%3.2% conv. - **edelbrock carburetor spacer**4K/yr+87.5%2.8% conv. - **4150 carb spacer**5K/yr+25.3%3.5% conv. - **carb spacer 1 inch**5K/yr+29.0%4.4% conv. - **holley carb spacer**4K/yr+41.5%3.9% conv. - **edelbrock carb spacer**4K/yr-6.6%2.8% conv. [**All search terms **](https://flapen.com/research/us/automotive/carburetor-spacer/search-terms)
## **Top carburetor spacer 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%2%$2K4%$3K6%$5K8%$7K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**uxcell Carb Spacers 1 Tall Open Phenolic Carburetor Spacer for Chevy for Ford 350 SBC BBC BB 4BBL with Gasket Screws Kit**uxcell**$21.76**4.3★42 rev](https://www.amazon.com/dp/B0CH196KH8) [2**1 Ported Phenolic Carburetor Spacer 4bbl SBC BBC BB Compatible for Holley SB Chevy Ford**TAKPART**$23.11**4.5★158 rev](https://www.amazon.com/dp/B086W5D77L) [3**2 Open Phenolic Carburetor Spacer for Holley 4150 4160 4 Barrel Carb - Compatible with SBC BBC Small Block Big Block Chevy Engine**Zenymb**$25.14**4.6★6 rev](https://www.amazon.com/dp/B0DYMVN47Z) [4**Edelbrock 8723 1/2 Carburetor Spacer**Edelbrock**$47.45**4.8★200 rev](https://www.amazon.com/dp/B003D2BXC6) [5**For Edelbrock 1 Ported Carburetor Spacer Adapter board 4BBL Chevy Ford Holley**HENKYO**$41.06**4.4★30 rev](https://www.amazon.com/dp/B0CJ4S9M3W)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Pindex Carburetor Gaskets Spacer W/ 3/8 Vacuum Tube Compatible with Ford Mopar Holley**Pindex**$15.83**665 rev8mo ago](https://www.amazon.com/dp/B0FYCDDNCC) [**Aomitop 9265 Engine Carburetor Heat Insulator Gasket Spacer-Square-Bore Compatible with Edelbrock Performer Intake & Holley 4150 Carb - Reduced Heat Soak & Fuel Percolation**Aomitop**$24.43**9 rev11mo ago](https://www.amazon.com/dp/B0FL2KM4KW) [**1 Tall Ported Phenolic Carburetor Spacer 4 Hole Compatible for SB 4150/4160 4bbl. SBC BBC Carb**LPFIDI**$24.84**12 rev1y ago](https://www.amazon.com/dp/B0FFLVDRYW) [**RoyalAir 1/4 inch Carburetor Spacer 4 Holes Carburetor Heat Shield Base**RoyalAir**$20.00**15 rev1y ago](https://www.amazon.com/dp/B0F144NYT9) [**HEROFFIX 1 Set Carb Spacers for Chevy for Ford 350 SBC BBC BB 4BBL 1 Tall Open Phenolic Carburetor Spacer with Gasket Screws Kit**HEROFFIX**$27.16**31 rev1y ago](https://www.amazon.com/dp/B0DK9D1JH2)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**2 Open Phenolic Carburetor Spacer for Holley 4150 4160 4 Barrel Carb - Compatible with SBC BBC Small Block Big Block Chevy Engine**Zenymb**$25.14**4.6★**▲ 141%**](https://www.amazon.com/dp/B0DYMVN47Z) [**1 Tall Ported Phenolic Carburetor Spacer 4 Hole Compatible for SB 4150/4160 4bbl. SBC BBC Carb**LPFIDI**$24.84**4.2★**▲ 103%**](https://www.amazon.com/dp/B0FFLVDRYW) [**1 Carburetor Spacer Adapter Replacement for Holley 4BBL Carter AFB for Edelbrock 4BBL 4 barrel carb**ZZHHIWANN**$21.97**4.2★**▲ 99%**](https://www.amazon.com/dp/B0FSR4Z11B) [**Edelbrock 8713 Carburetor Spacer**Edelbrock**$59.82**4.4★**▲ 75%**](https://www.amazon.com/dp/B000CN55M8) [**RoyalAir 1/4 inch Carburetor Spacer 4 Holes Carburetor Heat Shield Base**RoyalAir**$20.00**4.9★**▲ 52%**](https://www.amazon.com/dp/B0F144NYT9)
**~~View all trending →~~**
## **What buyers say about carburetor spacer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**27%
*“Fit is good”*
**Quality-Overall**22%
*“Excellent product”*
**Advertised Vs Actual Product**11%
*“worked as advertised”*
**Efficiency**7%
*“Worked perfectly”*
**Value For Money**6%
*“Good price”*
**Assembly/Installation**5%
*“Simple to install”*
**Heating**4%
*“Worked well to reduce carb heat”*
**Fuel Efficiency**3%
*“I noticed a significant performance increase once the fuel stopped boiling”*
**Ease Of Use**3%
*“Easy to use”*
**Material Quality**2%
*“the material seems durable”*
### **What buyers complain about **
**Size-Overall**24%
*“was a little small”*
**Quality-Overall**14%
*“Hardware is poor standard quality”*
**Mounting**9%
*“Can only have the studs in the manifold a couple of turns in order for the carb mounting nuts to fit”*
**Strength**8%
*“Very brittle”*
**Leak-Proof**4%
*“the carburetor leaks”*
**Advertised Vs Actual Product**4%
*“Not advertised correctly”*
**Durability**3%
*“As I was removing the other one broke off”*
**Material Quality**2%
*“Cheap plastic do not buy”*
**Compatibility-Overall**2%
*“Won't fit my carb”*
**Value For Money**2%
*“And we all know they aren't cheap these days”*
### **Top return reasons **
**Size-Overall**49%
**Defective Material/Parts**12%
**Compatibility-Overall**9%
**Advertised Vs Actual Product**4%
**Functionality-Overall**4%
**Mounting**3%
**Material Quality**3%
**Quality-Overall**3%
**Thickness**2%
**Assembly/Installation**1%
## **Common questions**
- **Is carburetor spacer profitable to sell on Amazon United States?**
- The niche generates $84K/yr across 72 tracked products. 4 of 19 products launched in the last 360 days are still selling. 90-day search growth is +17.2%. Flapen's verdict: Worth a look (63/100).
- **How competitive is the carburetor spacer niche?**
- 36 brands and 103 sellers compete. The top 5 products take 25% of clicks and top 5 brands hold 44% of demand.
- **What do buyers complain about in carburetor spacer?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Mounting. The return rate is 3.7%.
- **What does it cost to enter the carburetor spacer niche?**
- Listings span $12.04–$63.18; the average listing price is $31.86 (sweet spot $15–$100). The average incumbent carries 69 reviews — the moat a new listing must climb.
## **Related niches in Automotive**
- 72 [**brake bleeder kit**](https://flapen.com/research/us/automotive/brake-bleeder-kit)$2.2M/yr+8.2%**Launch it**- 72 [**gas can pump**](https://flapen.com/research/us/automotive/gas-can-pump)$1.7M/yr+20.1%**Launch it**- 72 [**dewalt hedge trimmer**](https://flapen.com/research/us/automotive/dewalt-hedge-trimmer)$1.6M/yr+158.2%**Launch it**- 72 [**iron eraser**](https://flapen.com/research/us/automotive/iron-eraser)$107K/yr>1,000%**Worth a look**- 72 [**marine fuel line**](https://flapen.com/research/us/automotive/marine-fuel-line)$198K/yr+104.3%**Worth a look**- 72 [**garden hose filter**](https://flapen.com/research/us/automotive/garden-hose-filter)$729K/yr+110.7%**Worth a look**[**All Automotive niches **](https://flapen.com/research/us/automotive)