Is valve cover breather profitable to sell on Amazon United States?

The niche generates $87K/yr across 53 tracked products. 1 of 8 products launched in the last 360 days are still selling. 90-day search growth is +5.4%. Flapen's verdict: Worth a look (55/100).

How competitive is the valve cover breather niche?

31 brands and 102 sellers compete. The top 5 products take 37% of clicks and top 5 brands hold 52% of demand.

What do buyers complain about in valve cover breather?

Top complaints mined from reviews: Size-Overall, Quality-Overall, Mounting. The return rate is 2.5%.

When does demand for valve cover breather peak?

Demand is steady year-round — the busiest month runs 1.6× the quietest.

What does it cost to enter the valve cover breather niche?

Listings span $4.76–$58.06; the average listing price is $19.24 (sweet spot $15–$100). The average incumbent carries 239 reviews — the moat a new listing must climb.

valve cover breather

Worth a look

Shows a thin review moat (239 avg reviews), but a small market ($87K/yr) keeps it on the watch list.

Review moat

Great239.47

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$19.24

avg listing price — sweet spot $15–$100

Brand share

Great52%

top-5 brand share — no brand owns this niche

Price range

Great$4.76–$58.06

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

Competition

Great37%

top-5 click share — an open shelf

Returns

Good2.5%

return rate — above 5% kills the launch gate

Conversion

Okay3.8%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+5.4%

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

Market size

Bad$87K

$87K/yr · 119K searches

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, valve cover breather is a $87K/yr Amazon United States market (119K searches/yr). The top 5 brands hold 52% of demand. Verdict: Worth a look — 55/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

valve cover breather market data

Units sold / yr: 4K–5K; avg 0–100/product
Revenue / yr: $77K–$96K; units × avg price
Conversion rate: 3.8%
Avg BSR: #702
Page quality: 0%
Prime: 96%
Sponsored: 62%
Out of stock: 4.6%
Avg brand age: 52 months
Avg seller age: 172 days

Competition & brand share

Clicks spread well past the top 5 (37% combined) — an open shelf where new products get seen.

Brands

31 rising

Sellers

102

Top-5 brand share

52%

Top 20: 92%

Top-5 click share

37%

Top 20: 74%

Open market

43%

Spectre17%
Calvana15%
muge racing8%
RYANSTAR RACING7%
Edelbrock5%
K&N5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +5.4% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.6×

Open Trend

Top valve cover breather search terms

valve cover breather69K/yr +6.6%3.2% conv.
sbc valve cover breather11K/yr +1.6%4.4% conv.
valve cover breathers8K/yr -4.2%2.0% conv.
valve cover breather filter8K/yr +14.3%3.4% conv.
pcv breather6K/yr +4.5%2.7% conv.
oil breather cap6K/yr +16.2%2.1% conv.
oil breather4K/yr +4.8%2.4% conv.
valve cover filter4K/yr +1.8%4.2% conv.
chevy valve cover breather4K/yr -6.4%3.0% conv.

All search terms

Top valve cover breather 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.

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

(2-Pack) Calvana Round Push-In Breather with 1 Tube for 1-1/4 Hole in Valve Cover Includes Grommet Compatible with Spectre 4276 Fits SBC BBC SBF 327 350 302 454 and 502

Calvana$15.514.6★49 rev

Spectre Performance 4299 .75 Push-In Breather with Grommet

Spectre$9.234.6★600 rev

Spectre Performance 4276 1-1/4 Push-In Breather with Grommet

Spectre$9.154.6★1,519 rev

(2-Pack) Calvana 4299 3/4 Push-In Chrome Valve Cover Breather Pro - for Spectre Steel Construction Grommet Included 2.5 Height 3 Diameter

Calvana$16.174.6★49 rev

RYANSTAR RACING 23MM High Flow Vent Valve Cover Breather Filter Universal Car Air Filter Cold Air Intake Filter Small Air Filter Breather Universal Air Vent Cover Black

RYANSTAR RACING$12.764.5★115 rev

Newest

by launch date

5339 Valve Cover Breather Grommet for All Valve Covers with 1-1/4 inch Filler-breather Holes 2 Pack (0.75 & 1 I D) Oil & Heat Resistant PVC Cover Grommet for SBC BBC SBF Engines Vent Systems

BANLIN$8.2643 rev

7mo ago

(2-Pack) Calvana 4299 3/4 Push-In Chrome Valve Cover Breather Pro - for Spectre Steel Construction Grommet Included 2.5 Height 3 Diameter

Calvana$16.1749 rev

7mo ago

SSN Polished Oval Finned Aluminum Valve Cover Air Breather PCV Valve Combo Compatible with Chevy Ford 2PCS.

SSN$47.103 rev

10mo ago

BIGREAT Silver Aluminum Smooth Valve Cover & Breather Combo with 2 Grommets Compatible with SBC BBC SBF For 1-1/4 Hole-2PC

BIGREAT$58.0620 rev

1y ago

BIGREAT Black Aluminum Smooth Valve Cover & Breather Combo with 2 Grommets Compatible with SBC BBC SBF For 1-1/4 Hole-2PC

BIGREAT$57.6120 rev

1y ago

What buyers say about valve cover breather

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

What buyers love

Size-Overall30%

“Fit excellent”

Quality-Overall19%

“Quality control has improved”

Value For Money17%

“Great for the price”

Advertised Vs Actual Product8%

“As advertised on time”

Assembly/Installation6%

“Installation isnt to bad”

Efficiency3%

“Does well”

Design-Overall3%

“add a classic look”

Leak-Proof3%

“Looks great and seems of good quality, seals up well and doesnt leak”

Heating1%

“Work great on my hot rod”

Soft Feel1%

“Looks and feels good”

What buyers complain about

Size-Overall18%

“Too big”

Quality-Overall8%

“poor quality chrome”

Mounting8%

“Mounting design could be improved otherwise good quality parts as usual from EE”

Durability8%

“It broke”

Assembly/Installation7%

“Very frustrating installation”

Functionality-Overall3%

“Work like a grommet should work”

Filtration3%

“the only thing I had a problem with is that the breath filter had oil that would come out of it”

Motor Issues3%

“Does not any of my motors like it says”

Defective Material/Parts3%

“Defective catch can”

Advertised Vs Actual Product3%

“Does not fit as advertised”

Top return reasons

Size-Overall61%

Compatibility-Overall11%

Advertised Vs Actual Product6%

Defective Material/Parts4%

Filtration3%

Functionality-Overall2%

Assembly/Installation2%

Mounting1%

Value For Money1%

Color1%

Common questions

Is valve cover breather profitable to sell on Amazon United States?: The niche generates $87K/yr across 53 tracked products. 1 of 8 products launched in the last 360 days are still selling. 90-day search growth is +5.4%. Flapen's verdict: Worth a look (55/100).
How competitive is the valve cover breather niche?: 31 brands and 102 sellers compete. The top 5 products take 37% of clicks and top 5 brands hold 52% of demand.
What do buyers complain about in valve cover breather?: Top complaints mined from reviews: Size-Overall, Quality-Overall, Mounting. The return rate is 2.5%.
When does demand for valve cover breather peak?: Demand is steady year-round — the busiest month runs 1.6× the quietest.
What does it cost to enter the valve cover breather niche?: Listings span $4.76–$58.06; the average listing price is $19.24 (sweet spot $15–$100). The average incumbent carries 239 reviews — the moat a new listing must climb.