3.00" to 4.00" Silicone Reducer Hose 3-Ply Black/Red
Specifications Part numbers, fitment codes and shipping
- Brand
- K2 Industries
- Speedzone SKU
- K2-1378-UNV-006-TSARK
- Manufacturer part number
- K2-1378-UNV-006-TSARK
- UPC
- SH-3-4-BK-RD
- Category
- Tool Sets and Repair Kits
- Shipping weight
- 2.0 lb
3.00" to 4.00" Silicone Reducer Hose — 3-Ply Black/Red
Tapered silicone hose steps down from 3-inch to 4-inch diameter in one smooth transition. Built with 3-ply reinforced construction for boost lines, coolant routing, and vacuum applications. Black exterior with red inner core for visibility and durability under heat and pressure.
Key Features
- Tapered design - Connects mismatched hose diameters without adapters or couplers
- Silicone material - Handles boost pressure, coolant, and vacuum duty reliably
- 3-ply reinforcement - Inner fabric layers resist collapse and bursting under load
Specs
- Material: Silicone with 3-ply reinforcement
- Diameter: 3.00" to 4.00" reducer
- Color: Black exterior, red interior
Whats Included
- One silicone reducer hose (3.00" to 4.00")
Frequently Asked Questions
Do I need clamps, and what size should I use?
Clamps aren't included — you'll need hose clamps to secure both ends. Use clamp sizes appropriate for your 3-inch and 4-inch connections; stainless steel clamps are ideal for durability.
Can I use this for coolant, boost, or vacuum lines?
Yes. Silicone handles all three, including boost pressure and vacuum draw. Confirm your system's pressure rating matches silicone's capability on your specific application before installation.
Will this hose fit my existing connections without modification?
The taper is designed to connect 3-inch and 4-inch ports directly. Test-fit it in place before ordering clamps to confirm both ends seat properly on your fittings.
Full details on shipping times, returns, warranty and cancellations are on our policy page.
Market conditions after 2020 have changed the landscape of automotive parts. Although we stock thousands of items across multiple warehouses and distribution channels, back-orders are unavoidable in today's market. If you need a product quickly, email, message or call us to check availability so we can explore your options.
Email Sales@Speedzoneweb.com
Call 407-846-8430
Text 407-749-6314
Answers to common questions are on our FAQ page.
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