Is ls rear main seal profitable to sell on Amazon United States?

The niche generates $58K/yr across 18 tracked products. 2 of 5 products launched in the last 360 days are still selling. 90-day search growth is -13.4%. Flapen's verdict: Skip it (47/100).

How competitive is the ls rear main seal niche?

17 brands and 66 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 67% of demand.

What do buyers complain about in ls rear main seal?

Top complaints mined from reviews: Leak-Proof, Durability, Quality-Overall. The return rate is 2.9%.

What does it cost to enter the ls rear main seal niche?

Listings span $13.71–$69.20; the average listing price is $29.66 (sweet spot $15–$100). The average incumbent carries 263 reviews — the moat a new listing must climb.

ls rear main seal

Skip it

A small market ($58K/yr) — this niche doesn't clear our bar today.

Avg price

Incredible$29.66

avg listing price — sweet spot $15–$100

Price range

Great$13.71–$69.20

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

Review moat

Great263.33

avg incumbent reviews — the moat a new listing must climb

Conversion

Great8.9%

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

Brand share

Good67%

top-5 brand share — brands hold most of the demand

Returns

Good2.9%

return rate — above 5% kills the launch gate

Competition

Okay63%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-13.4%

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

Market size

Bad$58K

$58K/yr · 22K searches

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, ls rear main seal is a $58K/yr Amazon United States market (22K searches/yr). The top 5 brands hold 67% of demand. Verdict: Skip it — 47/100.

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

ls rear main seal market data

Units sold / yr: 2K–2K; avg 0–100/product
Revenue / yr: $44K–$59K; units × avg price
Conversion rate: 8.9%
Avg BSR: #704
Page quality: 0%
Prime: 100%
Sponsored: 94%
Out of stock: 4.9%
Avg brand age: 53 months
Avg seller age: 153 days

Competition & brand share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 rising

Sellers

Top-5 brand share

67%

Top 20: 100%

Top-5 click share

63%

Top 20: 100%

Open market

28%

Dorman19%
Fel-Pro15%
AUTOBABA13%
Sumyola13%
A-Premium7%
RADHLBNIU6%

Demand

Weekly Amazon search volume, last 15 weeks — -13.4% search growth over the last 90 days.

Open Trend

Top ls rear main seal search terms

ls rear main seal9K/yr -19.0%10.4% conv.
rear main seal for 5.3 chevy engine4K/yr +130.4%4.2% conv.
5.3 rear main seal5K/yr -2.6%5.1% conv.
rear main seal 5.33K/yr -89.4%3.9% conv.

All search terms

Top ls rear main seal 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 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Dorman 635-518 Engine Rear Main Seal Cover Compatible with Select Models

Dorman$49.634.6★1,169 rev

FEL-PRO BS 40640 Engine Crankshaft Seal Kit for Chevrolet Silverado 1500

Fel-Pro$21.594.8★2,112 rev

Engine Rear Main Seal Cover Kit with Gasket & Bolt Compatible with Cadillac Escalade GMC Yukon Sierra Chevy Suburban Silverado Tahoe Express 4.8 5.3 6.0 6.2L Replace# 635-518 12633579 12639250

AUTOBABA$36.044.6★123 rev

Sumyola Rear Main Seal Gasket Cover & Bolts GM Chevy LS Engine 635-518 12633579 12639250

Sumyola$28.024.3★38 rev

A-Premium Engine Rear Main Seal Cover Kit [OHV 8Cyl 4.8 5.3 5.7 6.0 6.2 7.0L] Compatible with Chevy GMC Cadillac Hummer Isuzu Pontiac Saab & Buick fits Express Silverado Sierra & More Models

A-Premium$36.374.1★349 rev

Newest

by launch date

VANLISON Rear Main Seal Cover Kit - Compatible with Chevy Silverado Tahoe Suburban Avalanche GMC Sierra Yukon Savana ESC 4.8L 5.3L 6.0L 6.2L - Replaces 635-518 12633579 12639250

Vanlison$31.681 rev

5mo ago

KAFKOF Rear Main Seal Gasket Kit Compatible with 4.8L 5.3L 5.7L 6.0L 6.2L Chevy Silverado Tahoe Suburban GMC Sierra Yukon Savana Cadillac Escalade. Engine Crankshaft Seal Kit Replace BS40640 12639249

kafkof$14.3813 rev

6mo ago

vocsvok BS40640 Rear Main Seal Kit for Hummer Chevy Silverado GMC Buick Cadillac - Fits GM 4.8L 5.3L 5.7L 6.0L LS Engines Replacement Crankshaft Seal Metal Gasket Set

vocsvok$13.716 rev

7mo ago

LOBIUTIYA 635-518 Rear Main Seal Kit with Oil Pan Gasket 12612350 Oil Pan Gaskets for Chevy Silverado Suburban Tahoe Trailblazer GMC Sierra Yukon 4.8L 5.3L 6.0L 6.2L 12637683

LOBIUTIYA$69.2016 rev

9mo ago

Sumyola Engine Rear Main Seal Cover Kit with Gasket & Bolt for Cadillac Escalade for GMC Yukon Sierra for Chevy Suburban Silverado Tahoe Express 4.8 5.3 6.0 6.2L Replace# 635-518 12633579 12639250

Sumyola$26.0715 rev

10mo ago

What buyers say about ls rear main seal

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

What buyers love

Quality-Overall28%

“The bolts look like very good quality”

Size-Overall24%

“Fit great”

Leak-Proof12%

“No more leaking rear main seal”

Advertised Vs Actual Product10%

“It does was supposed to do”

Assembly/Installation6%

“Easy install”

Value For Money6%

“the price is fair”

Efficiency3%

“Works great”

Maintenance And Repair1%

“GM V8 engines can last a very long time with proper maintenance”

Safety Standards1%

“Seals the rear main as it should”

Fuel Efficiency1%

“it plays a big role in keeping a 5.3L Chevy motor clean and healthy”

What buyers complain about

Leak-Proof38%

“Leaks”

Durability10%

“Lasted 6 months and blew out”

Quality-Overall9%

“Junk”

Assembly/Installation8%

“I havent installed it yet”

Compatibility-Overall5%

“engineering does not fit the Eco tech 5.3 L”

Defective Material/Parts5%

“Received unusable part”

Size-Overall3%

“only complaint was the supplied bolts are larger than factory”

Thickness3%

“This is actually thicker than the factory cover”

Maintenance And Repair1%

“I replaced it before setting the engine in the new frame to save myself the headache of having to replace it later”

Lubrication1%

“I lost oil pressure late January 2026”

Top return reasons

Size-Overall22%

Leak-Proof14%

Defective Material/Parts12%

Value For Money9%

Compatibility-Overall8%

Product Condition6%

Quality-Overall6%

Advertised Vs Actual Product5%

Functionality-Overall3%

Assembly/Installation3%

Common questions

Is ls rear main seal profitable to sell on Amazon United States?: The niche generates $58K/yr across 18 tracked products. 2 of 5 products launched in the last 360 days are still selling. 90-day search growth is -13.4%. Flapen's verdict: Skip it (47/100).
How competitive is the ls rear main seal niche?: 17 brands and 66 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 67% of demand.
What do buyers complain about in ls rear main seal?: Top complaints mined from reviews: Leak-Proof, Durability, Quality-Overall. The return rate is 2.9%.
What does it cost to enter the ls rear main seal niche?: Listings span $13.71–$69.20; the average listing price is $29.66 (sweet spot $15–$100). The average incumbent carries 263 reviews — the moat a new listing must climb.