K2 Industries
3.00" to 4.00" Silicone Reducer Hose 90 Degree 3-Ply Black/Red
3.00" to 4.00" Silicone Reducer Hose 90 Degree 3-Ply Black/Red
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3.00" to 4.00" Silicone Reducer Hose 90 Degree 3-Ply Black/Red
Step down from 3-inch to 4-inch diameter with a 90-degree bend in one piece. Made from silicone with three reinforced plies, this hose handles coolant, boost, and intake routing in high-heat engine bays. Black exterior with red interior for easy identification under the hood.
Key Features
- Silicone construction - Handles sustained high temps without degradation or cracking
- Tapered reducer - One hose replaces step-down adapters and multiple clamps
- Color-coded interior - Red core makes routing and inspection straightforward
Specs
- Material: Silicone
- Configuration: 90-degree elbow with 3.00" to 4.00" taper
- Construction: 3-ply reinforced
- Color: Black exterior, red interior
What's Included
- 1x 3.00" to 4.00" Silicone Reducer Hose 90 Degree
Frequently Asked Questions
Do I need clamps for this hose, and what size?
You'll need hose clamps at both ends—one for the 3-inch side and one for the 4-inch side. Clamps are not included, so grab stainless steel units sized to match your barbed fittings or ports.
Can this hose handle boost and coolant both, or should I pick one?
Silicone handles both coolant and turbo boost without issue. Use it wherever you need that diameter step-down—intercooler piping, radiator hoses, intake manifold runners, all fair game.
What's the difference between this 3-ply and cheaper 1-ply silicone hoses?
Three plies mean more burst resistance and better shape retention under pressure and heat cycling. You're not buying a generic tube here—the reinforcement is real, and it shows in longevity.
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