3.00" to 4.00" Blue Silicone Reducer Hose - 3-Ply Construction
K2 Industries
3.00" to 4.00" Blue Silicone Reducer Hose - 3-Ply Construction
Check fitment before ordering
Match the year, make, model, trim and engine in the product details. Review mounting requirements and vehicle modifications. Ask us about this part.
Eligible returns within 30 days of receipt. Items must be unused, with original packaging and all included parts. Contact Lee Mods before sending anything back. Lee Mods pays return shipping for eligible U.S. returns; no restocking fee. See Returns & Exchanges for full conditions.
Product information from K2 Industries
Manufacturer warranty and guarantee statements below are subject to that manufacturer’s terms. For return eligibility through Lee Mods, see Returns & Exchanges. Ask Lee Mods to clarify any warranty or guarantee before ordering.
3.00" to 4.00" Blue Silicone Reducer Hose — 3-Ply Construction
Step down from 3-inch to 4-inch diameter with this reinforced silicone reducer hose. Built from 3-ply silicone construction for durability under boost and thermal cycles. The blue finish resists UV degradation and blends seamlessly into engine bays running blue-themed coolant or custom piping.
Key Features
- 3-Ply Silicone Construction - Handles repeated pressure cycles and temperature swings without cracking or separating.
- Blue Colorway - Matches coolant systems and custom engine bay builds; resists fading in direct sunlight.
- Stepped Diameter - Transitions cleanly from 3-inch to 4-inch, reducing the need for stepped fittings in tight spaces.
Specs
- Material: Silicone
- Configuration: Reducer hose, 3-inch to 4-inch diameter
- Construction: 3-ply reinforced
- Color: Blue
Whats Included
- 1x 3.00" to 4.00" blue silicone reducer hose
Frequently Asked Questions
Do I need clamps to install this hose?
Yes. You'll need hose clamps sized for both the 3-inch and 4-inch ends. Standard worm-gear clamps work fine—just confirm your clamp size before ordering.
Can I use this hose for coolant or only boost applications?
This hose is rated for both. The 3-ply silicone handles coolant temperatures and pressure equally well, so it works in radiator loops, intercooler setups, or custom plumbing.
Will this hose fit my existing fittings without adapters?
Depends on your current setup. The 3-inch end will slide onto any 3-inch barb or fitting; the 4-inch end does the same. If your fittings are a different size or style, you may need adapters—measure your barb diameter before committing.
Your vehicle
Select a vehicle to check the supplied application records for this part.
Choose or change vehicle →Product reference & ordering help
Supplier & part identification
K2 Industries
| Option | SKU / part reference |
|---|---|
| Standard | K2-1379-UNV-006-TSARK |
Vehicle compatibility
Read the application years, model, trim, engine and exclusions in the description above. A make-level collection or product recommendation alone does not confirm fitment.
Request fitment help →Installation & specifications
Review the manufacturer’s specifications and installation notes above. Confirm required mounting hardware, tools and modifications before ordering. If instructions are not supplied, contact us with the part reference.
Shipping expectations
Processing and delivery vary by product, supplier and destination. Contact us to confirm timing for your part before planning an installation.
Shipping & delivery informationManufacturer warranty
Coverage and exclusions vary by manufacturer and part. Review the supplied product documentation or ask us for the applicable terms.
Warranty information