---
title: "harley davidson spark plugs — Niche Verdict: Skip it (49/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/harley-davidson-spark-plugs"
last_updated: "2026-07-14T05:12:17.327Z"
locale: en
meta:
  description: "a small market ($78K/yr) — harley davidson spark plugs doesn't clear our bar today."
  "og:description": "a small market ($78K/yr) — harley davidson spark plugs doesn't clear our bar today."
  "og:title": "harley davidson spark plugs — Niche Verdict: Skip it (49/100) | Amazon United States - Flapen"
---

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# **harley davidson spark plugs**

**Skip it**

A small market ($78K/yr) — this niche doesn't clear our bar today.

Market size 19Growth 64Conversion 65Competition 22Returns 82Price range 74Avg price 85Brand share 19Review moat 72Quality gap 45

**Avg price**

**Great****$18.88**

avg listing price — sweet spot $15–$100

**Returns**

**Great****1.7%**

return rate — above 6% kills the launch gate

**Price range**

**Good****$6.55–$38.94**

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

**Review moat**

**Good****612.07**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Good****5.8%**

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

**Growth**

**Good****+42.4%**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****73%**

top-5 click share — a locked-up shelf

**Market size**

**Bad****$78K**

$78K/yr · 71K searches

**Brand share**

**Bad****93%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**8 **▼falling

**Sellers**

**51**

**Top-5 brand share**

**93%**

**Open market**

**4%**

- NGK71% - V-Twin9% - TORCH5% - CNPAPC4% - Motoforti4% - Atesilor3% - Open — no brand owns it (2 brands, 4%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$8K20%$16K30%$23K40%$31K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 14 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)](https://m.media-amazon.com/images/I/41DeqA-OWkL.jpg)**NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)**NGK**$20.62**4.7★4,931 rev](https://www.amazon.com/dp/B003BUCNNS) [2![NGK DCPR7EIX Spark Plug (2 Pack)](https://m.media-amazon.com/images/I/41DeqA-OWkL.jpg)**NGK DCPR7EIX Spark Plug (2 Pack)**NGK**$22.00**4.7★1,499 rev](https://www.amazon.com/dp/B003BUCSAG) [3![V-Twin Performance Spark Plugs Replaces Harley spark plug #6R12.](https://m.media-amazon.com/images/I/31NKexm6XiL.jpg)**V-Twin Performance Spark Plugs Replaces Harley spark plug #6R12.**V-Twin**$25.38**4.6★59 rev](https://www.amazon.com/dp/B07NPWCSTC) [4![NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- Compatible with Harley-Davidson Twin Cam and XL --- 4 PCS NEW](https://m.media-amazon.com/images/I/41ZP4NzywLL.jpg)**NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- Compatible with Harley-Davidson Twin Cam and XL --- 4 PCS NEW**NGK**$38.94**4.6★282 rev](https://www.amazon.com/dp/B00MG79MX6) [5![NGK (3932) DCPR7E Spark Plug - Pack of 4](https://m.media-amazon.com/images/I/51BRpLSML+L.jpg)**NGK (3932) DCPR7E Spark Plug - Pack of 4**NGK**$23.33**4.6★259 rev](https://www.amazon.com/dp/B00BPD8R74)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![SYKRSS DCPR7EIX Iridium Spark Plugs 2 Pack - Compatible with Fiat 500 2012-2017 1.4L L4 Chevy Spark 2013-2015 1.2L L4 Engine - Replaces 97637 6046 Spark Plug](https://m.media-amazon.com/images/I/41D1ipxvteL.jpg)**SYKRSS DCPR7EIX Iridium Spark Plugs 2 Pack - Compatible with Fiat 500 2012-2017 1.4L L4 Chevy Spark 2013-2015 1.2L L4 Engine - Replaces 97637 6046 Spark Plug**SYKRSS**$12.95**329 rev1y ago](https://www.amazon.com/dp/B0F1XFD8T5) [![Atesilor 10.4mm Spark Plug Wires Ignition Coil Wires Compatible with Harley-Davidson Big Twin Dyna Super Glide/Wide Glide/Low Rider 2000-2017 & Softail Springer/Slim/Deluxe/Deuce 1999-2017 (Black)](https://m.media-amazon.com/images/I/31g97meKZUL.jpg)**Atesilor 10.4mm Spark Plug Wires Ignition Coil Wires Compatible with Harley-Davidson Big Twin Dyna Super Glide/Wide Glide/Low Rider 2000-2017 & Softail Springer/Slim/Deluxe/Deuce 1999-2017 (Black)**Atesilor**$17.79**47 rev1y ago](https://www.amazon.com/dp/B0DK1LDH8M) [![TORCH 4pcs DK7RIU Iridium Spark Plugs Replace for NGK DCPR7E for BOSCH YR7DC+ Spark Plug for CHAMPION RA8HC/T04 for DENSO XU22EPR-U/3179/XU22EPR Spark Plug OEM](https://m.media-amazon.com/images/I/41JaR92rb6L.jpg)**TORCH 4pcs DK7RIU Iridium Spark Plugs Replace for NGK DCPR7E for BOSCH YR7DC+ Spark Plug for CHAMPION RA8HC/T04 for DENSO XU22EPR-U/3179/XU22EPR Spark Plug OEM**TORCH**$22.67**53 rev3y ago](https://www.amazon.com/dp/B0C9D24K25) [![BDFHYK Set of 4 Iridium Spark Plug Compatible with Harley-Davidson 1988-2016 Sportster 1200 1986-2016 Sportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637](https://m.media-amazon.com/images/I/51UrzzONTYL.jpg)**BDFHYK Set of 4 Iridium Spark Plug Compatible with Harley-Davidson 1988-2016 Sportster 1200 1986-2016 Sportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637**BDFHYK**$18.44**39 rev3y ago](https://www.amazon.com/dp/B0C77LN2PC) [![TORCH DK7RTC Spark Plug Replace for NGK DCPR7E Spark Plug for BOSCH YR7DC+ Spark Plug for CHAMPION 809/8809/OE083/RA6HC/RA8HC Spark Plug for DENSO IXU22/VXU22/XU22EPR-U/XU22TT Spark Plug OEM ea](https://m.media-amazon.com/images/I/31WIJhYZJaL.jpg)**TORCH DK7RTC Spark Plug Replace for NGK DCPR7E Spark Plug for BOSCH YR7DC+ Spark Plug for CHAMPION 809/8809/OE083/RA6HC/RA8HC Spark Plug for DENSO IXU22/VXU22/XU22EPR-U/XU22TT Spark Plug OEM ea**TORCH**$6.55**70 rev4y ago](https://www.amazon.com/dp/B00264F3ZA)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![NGK Genuine DCPR7E Spark Plug](https://m.media-amazon.com/images/I/51NYa7S+55L.jpg)**NGK Genuine DCPR7E Spark Plug**NGK**$15.53**3.8★**▲ 83%**](https://www.amazon.com/dp/B003CPZ1JA) [![BDFHYK Set of 4 Iridium Spark Plug Compatible with Harley-Davidson 1988-2016 Sportster 1200 1986-2016 Sportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637](https://m.media-amazon.com/images/I/51UrzzONTYL.jpg)**BDFHYK Set of 4 Iridium Spark Plug Compatible with Harley-Davidson 1988-2016 Sportster 1200 1986-2016 Sportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637**BDFHYK**$18.44**4.3★**▲ 39%**](https://www.amazon.com/dp/B0C77LN2PC) [![TORCH 4pcs DK7RIU Iridium Spark Plugs Replace for NGK DCPR7E for BOSCH YR7DC+ Spark Plug for CHAMPION RA8HC/T04 for DENSO XU22EPR-U/3179/XU22EPR Spark Plug OEM](https://m.media-amazon.com/images/I/41JaR92rb6L.jpg)**TORCH 4pcs DK7RIU Iridium Spark Plugs Replace for NGK DCPR7E for BOSCH YR7DC+ Spark Plug for CHAMPION RA8HC/T04 for DENSO XU22EPR-U/3179/XU22EPR Spark Plug OEM**TORCH**$22.67**4.6★**▲ 22%**](https://www.amazon.com/dp/B0C9D24K25) [![SYKRSS DCPR7EIX Iridium Spark Plugs 2 Pack - Compatible with Fiat 500 2012-2017 1.4L L4 Chevy Spark 2013-2015 1.2L L4 Engine - Replaces 97637 6046 Spark Plug](https://m.media-amazon.com/images/I/41D1ipxvteL.jpg)**SYKRSS DCPR7EIX Iridium Spark Plugs 2 Pack - Compatible with Fiat 500 2012-2017 1.4L L4 Chevy Spark 2013-2015 1.2L L4 Engine - Replaces 97637 6046 Spark Plug**SYKRSS**$12.95**4.5★**▲ 13%**](https://www.amazon.com/dp/B0F1XFD8T5) [![NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- Compatible with Harley-Davidson Twin Cam and XL --- 4 PCS NEW](https://m.media-amazon.com/images/I/41ZP4NzywLL.jpg)**NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- Compatible with Harley-Davidson Twin Cam and XL --- 4 PCS NEW**NGK**$38.94**4.6★**▲ 11%**](https://www.amazon.com/dp/B00MG79MX6)

**~~View all trending →~~**

## **Demand**

Weekly Amazon search volume, last 40 weeks — +42.4% search growth over the last 90 days.

2K1KSpike '26Oct '25Nov '25Dec '25Feb '26Mar '26May '26Jun '26

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Quality-Overall**23%

*“Quality Products”*

**Socket/Port/Plug**18%

*“Plugs great”*

**Value For Money**17%

*“Excellent price”*

**Size-Overall**15%

*“good fit”*

**Advertised Vs Actual Product**12%

*“Works as it should”*

**Efficiency**7%

*“Did the job”*

**Durability**3%

*“040 so it's good to know these are as durable as they're advertised to be”*

**Ease Of Use**1%

*“Ease of use”*

**Assembly/Installation**1%

*“they where easy to install yes you do need to gap them”*

### **What buyers complain about **

**Advertised Vs Actual Product**25%

*“not listed right”*

**Size-Overall**13%

*“The longer wire was a bit long”*

**Compatibility-Overall**13%

*“Not compatible with older Harley models that it ought to fit”*

**Quality-Overall**13%

*“why not make a good product”*

**Socket/Port/Plug**13%

*“The plug end that goes in the solenoid is too small”*

### **Top return reasons **

**Size-Overall**54%

**Compatibility-Overall**15%

**Socket/Port/Plug**7%

**Advertised Vs Actual Product**5%

**Defective Material/Parts**5%

**Value For Money**3%

**Product Condition**3%

**Functionality-Overall**2%

**Color**2%

**Quality-Overall**1%