Is stl010 profitable to sell on Amazon United States?

The niche generates $215K/yr across 8 tracked products. 2 of 5 products launched in the last 360 days are still selling. 90-day search growth is +27.7%. Flapen's verdict: Skip it (45/100).

How competitive is the stl010 niche?

7 brands and 37 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 94% of demand.

What do buyers complain about in stl010?

Top complaints mined from reviews: Heating, Functionality-Overall, Compatibility-Overall. The return rate is 4.1%.

When does demand for stl010 peak?

Demand peaks in May–Jun; the busiest month runs 2.3× the quietest.

What does it cost to enter the stl010 niche?

Listings span $20.20–$77.99; the average listing price is $41.90 (sweet spot $15–$100). The average incumbent carries 316 reviews — the moat a new listing must climb.

stl010

Skip it

A concentrated shelf (top 5 take 90% of clicks) — this niche doesn't clear our bar today.

Avg price

Incredible$41.90

avg listing price — sweet spot $15–$100

Price range

Incredible$20.20–$77.99

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

Review moat

Great316

avg incumbent reviews — the moat a new listing must climb

Growth

Good+27.7%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Conversion

Okay3.8%

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

Market size

Okay$215K

$215K/yr · 134K searches

Returns

Okay4.1%

return rate — above 5% kills the launch gate

Brand share

Bad94%

top-5 brand share — brand-locked demand

Competition

Bad90%

top-5 click share — a locked-up shelf

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, stl010 is a $215K/yr Amazon United States market (134K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in May–Jun. Verdict: Skip it — 45/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

stl010 market data

Units sold / yr: 6K–8K; avg 500–750/product
Revenue / yr: $251K–$335K; units × avg price
Conversion rate: 3.8%
Avg BSR: #185
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 29 months
Avg seller age: 162 days

Competition & brand share

The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

94%

Top 20: 100%

Top-5 click share

90%

Top 20: 100%

Open market

Pacific Performance Engineering47%
WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC29%
Prutomr7%
Lithops7%
JINGTAO884%
YzusGomumu4%
Open — no brand owns it (1 brand, 2%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +27.7% search growth over the last 90 days.

Peak months: May, Jun · busiest ÷ quietest = 2.3×

Open Trend

Top stl010 search terms

6l80 thermostat bypass kit31K/yr +1.8%3.7% conv.
ppe transmission fluid thermal bypass valve18K/yr +77.3%3.1% conv.
transmission thermal bypass valve8K/yr +48.4%1.0% conv.
gm 6l80 thermal bypass valve8K/yr +36.6%2.7% conv.
transmission bypass valve7K/yr +41.0%1.4% conv.
stl0106K/yr +14.4%9.5% conv.
thermal bypass valve7K/yr +3.9%1.2% conv.
thermal bypass valve silverado5K/yr +152.9%1.3% conv.
ppe thermal bypass valve 6l805K/yr +26.6%5.7% conv.
thermal bypass valve 6l806K/yr +12.2%3.9% conv.

All search terms

Top stl010 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 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Pacific Performance Engineering PPE Automatic Transmission Fluid Thermal Bypass Valve Compatible with 2014-2018 GM Tahoe Silverado Sierra 1500 Escalade Yukon 6L80 5.3L 6.2L 4.3L 125068000 Black

Pacific Performance Engineering$77.994.6★395 rev

WIT WHATEVER IT TAKES TRANSMISSION PARTS INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 with Bypass Gasket

WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC$46.274.8★533 rev

WIT WHATEVER IT TAKES TRANSMISSION PARTS INC Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010

WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC$41.374.8★1,505 rev

Premium Aluminum Transmission Fluid Thermal Bypass Valve OE-Fit Design Compatible with 2014-2018 GM 6L80 Trans Fit for Chevrolet Silverado Tahoe GMC Sierra Yukon Cadillac Escalade CT6#125068000

Prutomr$33.304.4★41 rev

Transmission Thermal Bypass Valve for GM 6L80 6 Speed Automatic Heavy Duty Cooling for Towing & Hauling Compatible 20142018 Silverado Sierra 1500 Tahoe Yukon Escalade 5.3L 6.2L 4.3L / 125068000

Lithops$55.073.8★29 rev

Newest

by launch date

Transmission Thermal Bypass Valve for GM 6L80 6 Speed Automatic Heavy Duty Cooling for Towing & Hauling Compatible 20142018 Silverado Sierra 1500 Tahoe Yukon Escalade 5.3L 6.2L 4.3L / 125068000

Lithops$55.0729 rev

6mo ago

CZTNQKT STL010 Cooler Flow Bypass Valve Kit with Bypass Gasket Cooling System Kit Upgrade Compatible With GM 2014-Up 6L80/6L90 Transmission 2016-Up 8L80/8L90/8L90E/10L90 Sure Cool System

CZTNQKT$20.203 rev

8mo ago

Premium Aluminum Transmission Fluid Thermal Bypass Valve OE-Fit Design Compatible with 2014-2018 GM 6L80 Trans Fit for Chevrolet Silverado Tahoe GMC Sierra Yukon Cadillac Escalade CT6#125068000

Prutomr$33.3041 rev

9mo ago

125068000 Automatic Transmission Fluid Thermal Bypass Valve is Designed for 2014-2018 GM 6L80 6 - Speed transmission Compatible with Cadillac Escalade Chevy Tahoe Suburban Silverado 1500

JINGTAO88$33.827 rev

10mo ago

YzusGomumu 6L80 Transmission Fluid Thermal Bypass Valve Compatible with 2014-2018 Chevrolet Tahoe Silverado 1500 GMC Sierra 1500 Cadillac Escalade GMC Yukon 5.3L 6.2L 4.3L Replaces 125068000

YzusGomumu$27.2215 rev

10mo ago

What buyers say about stl010

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

What buyers love

Assembly/Installation28%

“Easy install”

Quality-Overall16%

“Excellent product”

Size-Overall13%

“Fit good”

Efficiency8%

“Works well”

Value For Money7%

“Great value”

Advertised Vs Actual Product6%

“Works as advertised”

Coolant5%

“Keeps it nice and cool”

Ease Of Use4%

“Easy to use”

Heating2%

“Easy to install keeps transmission temperature cool”

Leak-Proof2%

“No leaks after installation”

What buyers complain about

Heating17%

“2 days later my transmission went into overheat mode at 255 degrees”

Functionality-Overall13%

“Not machine correctly”

Compatibility-Overall12%

“Im not sure why they put it is compatible with any 2014-2015 GM vehicles”

Size-Overall8%

“Does not fit correctly”

Leak-Proof7%

“Leaks like a sieve”

Durability4%

“This unit not complete for certain years”

Value For Money4%

“Too expensive”

Maintenance And Repair3%

“This will not repair a trans already going”

Spray/Flow2%

“feels like if the OEM valve was restricting flow”

Noise Level2%

“after a while my transmission started making some noise”

Top return reasons

Compatibility-Overall37%

Size-Overall20%

Defective Material/Parts13%

Functionality-Overall7%

Advertised Vs Actual Product5%

Assembly/Installation4%

Value For Money3%

Heating3%

Connectivity-Overall2%

Product Condition1%

Common questions

Is stl010 profitable to sell on Amazon United States?: The niche generates $215K/yr across 8 tracked products. 2 of 5 products launched in the last 360 days are still selling. 90-day search growth is +27.7%. Flapen's verdict: Skip it (45/100).
How competitive is the stl010 niche?: 7 brands and 37 sellers compete. The top 5 products take 90% of clicks and top 5 brands hold 94% of demand.
What do buyers complain about in stl010?: Top complaints mined from reviews: Heating, Functionality-Overall, Compatibility-Overall. The return rate is 4.1%.
When does demand for stl010 peak?: Demand peaks in May–Jun; the busiest month runs 2.3× the quietest.
What does it cost to enter the stl010 niche?: Listings span $20.20–$77.99; the average listing price is $41.90 (sweet spot $15–$100). The average incumbent carries 316 reviews — the moat a new listing must climb.