th350 dipstick
Skip itA small market ($43K/yr) — this niche doesn't clear our bar today.
Quality gap
Incredible3.8★avg incumbent rating — lower means beatable quality
Review moat
Incredible76.5avg incumbent reviews — the moat a new listing must climb
Avg price
Incredible$32.57avg listing price — sweet spot $15–$100
Price range
Incredible$16.70–$62.30cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good4.5%search→purchase rate — share of searches ending in a sale
Returns
Okay3.2%return rate — above 5% kills the launch gate
Brand share
Okay82%top-5 brand share — brands hold most of the demand
Competition
Okay65%top-5 click share — leaders hold, buyers still browse
Growth
Okay+1.8%90-day search growth — must beat 0% to launch
Market size
Bad$43K$43K/yr · 29K searches
According to Flapen's Amazon United States niche tracking, th350 dipstick is a $43K/yr Amazon United States market (29K searches/yr). The top 5 brands hold 82% of demand. Verdict: Skip it — 49/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
th350 dipstick market data
- Units sold / yr
- 2K–2K
- avg 0–100/product
- Revenue / yr
- $49K–$65K
- units × avg price
- Conversion rate
- 4.5%
- Avg BSR
- #629
- Page quality
- 0%
- Prime
- 89%
- Sponsored
- 72%
- Out of stock
- 3.9%
- Avg brand age
- 71 months
- Avg seller age
- 185 days
Competition & brand share
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.Brands
13 falling
Sellers
82
Top-5 brand share
82%
Top 20: 100%
Top-5 click share
65%
Top 20: 100%
Open market
15%
- HAHAHA45%
- ProForm19%
- Allstar Performance9%
- AXGSRV5%
- Mr. Gasket3%
- UOIENRT3%
- Open — no brand owns it (7 brands, 15%)
Demand & seasonality
Weekly Amazon search volume, last 60 weeks — +1.8% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Top th350 dipstick 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.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
HAHAHA -TH350/TH400 Dipstick Turbo 350/400 Firewall Mounted Flex Transmission Oil Dipstick Compatible with GM/Chevy (Black)
HAHAHA$34.544.3★123 rev
HAHAHA TH350 TH400 Turbo350 Firewall Mounted Flex Transmission Dipstick TH350/TH400 Stainless Braided Hose Compatible with GM/Chevy TH350/TH400 (Silver)
HAHAHA$29.054.3★112 rev
ProForm 66181 TH350 Locking Dipstick and Tube
ProForm$38.664.4★223 rev
ProForm 66182 TH400 Locking Dipstick and Tube
ProForm$37.094.2★154 rev
AXGSRV TH350 TH400 Turbo350 Firewall Mounted Flex Transmission Dipstick TH350/TH400 Stainless Braided Hose Compatible with GM/Chevy TH350/TH400 Replaces 700R4 Dipstick Rubber Transmission Dip Stick
AXGSRV$17.652.1★5 rev
Newest
by launch dateAXGSRV TH350 TH400 Turbo350 Firewall Mounted Flex Transmission Dipstick TH350/TH400 Stainless Braided Hose Compatible with GM/Chevy TH350/TH400 Replaces 700R4 Dipstick Rubber Transmission Dip Stick
AXGSRV$17.655 rev
HAHAHA 36 TH350 TH400 Transmission Dipstick Flex Stainless Braided Hose Firewall Mounted Compatible with GM Chevy TH350 TH400 Turbo 350/400 Universal Fit.36-Inch (Silver)
HAHAHA$39.8610 rev
HAHAHA Upgraded Chrome TH350/TH400 Turbo350/400 Transmission Dipstick Firewall Mounted Flex Oil Dipstick Compatible with GM/Chevy TH350/TH400 Turbo350/400 Chrome.
HAHAHA$39.4911 rev
Stainless Flexible Dipstick for GM Chevy TH400 TH350 Turbo Transmission SBC BBC Firewall Mounted
AmiliParts$26.7111 rev
1 pc SHLPDFM Black Steel TH400 GM Chevy Transmission Dipstick Tube 24 Long Compatible with Chevy GM Turbo 400 TH-400
SHLPDFM$30.967 rev
Trending
90-day click momentum
Speedway Motors TH350 Transmission Chrome Dipstick 27 Inch Steel Tube with Chrome Handle Bellhousing Mount Style for GM TH350 Durable Replacement Dipstick for Show Cars
Speedway Motors$16.703.8★
AXGSRV TH350 TH400 Turbo350 Firewall Mounted Flex Transmission Dipstick TH350/TH400 Stainless Braided Hose Compatible with GM/Chevy TH350/TH400 Replaces 700R4 Dipstick Rubber Transmission Dip Stick
AXGSRV$17.652.1★
Transmission Dipstick Stainless Steel Braided Hose Flexible Firewall Mount Compatible with TH350 TH400 700R4 for Chevy GM SBC BBC
JahyShow$24.333.7★
HAHAHA 36 TH350 TH400 Transmission Dipstick Flex Stainless Braided Hose Firewall Mounted Compatible with GM Chevy TH350 TH400 Turbo 350/400 Universal Fit.36-Inch (Silver)
HAHAHA$39.864.1★
Mr. Gasket Th350 Trans Dipstick 27L Chrome
Mr. Gasket$32.464.0★
What buyers say about th350 dipstick
What buyers praise and complain about, mined from review topics.What buyers love
“Best replacement dipstick”
“Fit Perfect”
“No leaks”
“Works as expected”
“Installation was straightforward”
“looks pretty”
“easy to do”
“Now its rock solid and works well”
“The look and design of this dipstick is great”
“It looks much cleaner in the engine bay”
What buyers complain about
“Doesnt fit a th 400 like it says”
“Leaks horribly”
“Bad quality control”
“Waste of time and money”
“it was used”
“Gonna have to bend it to straighten it out”
“Don't buy unless you want to repair it before installing”
“Had to adjust the mounting tab as it was bent”
“This thing is WILDLY inaccurate”
“Too thick to fit”
Top return reasons
Common questions
- Is th350 dipstick profitable to sell on Amazon United States?
- The niche generates $43K/yr across 18 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +1.8%. Flapen's verdict: Skip it (49/100).
- How competitive is the th350 dipstick niche?
- 13 brands and 82 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 82% of demand.
- What do buyers complain about in th350 dipstick?
- Top complaints mined from reviews: Size-Overall, Leak-Proof, Quality-Overall. The return rate is 3.2%.
- When does demand for th350 dipstick peak?
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- What does it cost to enter the th350 dipstick niche?
- Listings span $16.70–$62.30; the average listing price is $32.57 (sweet spot $15–$100). The average incumbent carries 77 reviews — the moat a new listing must climb.