K2 Industries
3.00" to 4.00" Blue Silicone Reducer Hose - 3-Ply Construction
3.00" to 4.00" Blue Silicone Reducer Hose - 3-Ply Construction
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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.
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