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The ETL INDUSTRIES 3.5" to 4" silicone reducer coupler is a 3-inch long, 4-ply reinforced intake hose designed for high-performance automotive and industrial applications. It offers exceptional temperature resistance (-60°C to 350°C) and a burst pressure of 140 PSI, ensuring durability and reliability across turbocharger, intercooler, and exhaust systems. Universal fit and backed by a 1-year warranty, it’s the smart upgrade for professionals demanding flawless airflow and longevity.












| ASIN | B0BV9TXQWL |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #27,294 in Automotive ( See Top 100 in Automotive ) #43 in Automotive Replacement Engine Turbocharger Hoses & Hose Clamps |
| Brand | ETL INDUSTRIES |
| Color | Black |
| Connector Type | Reducer |
| Customer Reviews | 4.7 4.7 out of 5 stars (168) |
| Date First Available | January 13, 2023 |
| Item Package Quantity | 1 |
| Item Weight | 6.4 ounces |
| Manufacturer | ETL INDUSTRIES |
| Material | Silicone |
| Package Dimensions | 5.43 x 5.31 x 3.31 inches |
| Part Number | ETL-232023 |
| Size | 3.5" ID to 4" ID |
| UPC | 740501247084 |
G**Y
Good quality- new product
Product arrived as expected, good quality - used as adapter at exit of Dewalt job saw and to Dewalt shop vac hose - perfect fit!!
A**N
Exactly what I needed at a good price
Fit exactly how I needed it to, flexible enough I was able to get it in easily but not so thick or thin that it wouldn't bend or bent too much. Seems quite durable and a great value.
T**.
Great product
Great product but I ordered the wrong one…
B**Y
Mass Airflow Coupler
Used this for my 22RE on my 85 Toyota. Works perfectly to pass low pressure air. Based on the material, it wouldn't have a problem with high pressure or heat either.
R**P
Good product if it is the exact size you need
Unfortunately, this didn't work well for me. I was hoping it would be more flexible, but it wasn't. It didn't stretch enough to get around the pipe I needed even though it was supposed to be the right size. It's good quality, as long as the fit is right.
J**F
Good adaptor.
I used this to connect to a harbor freight table saw and then to my dewalt shop vac I got at costco. The flexibility is nice because it stretches a bit for a tight seal.
L**N
It's rubber so it's versatile
Perfect for my dust collection setup
M**A
Used for a different purpose
I actually came across this while searching for a rubber adapter to transition the 6” OD outlet on my Super Dust Deputy Cyclone to the 5” OD inlet on my Delta 50-760 dust collector. It was a perfect fit and is very well made so I’m sure it will be great for it’s intended purpose.
J**N
was perfect to fit GTD1752VRK turbo on my OEM alh TDI piping , THANKS A LOT !"
S**I
Étanche et solide pour mon air climatisé
Trustpilot
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