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Renault R21 2.0 Turbo Silicone Hoses - Cooling and Boost System Kits

REDOX silicone hoses for Renault R21 2.0 Turbo are specifically designed to replace OEM hoses on the F3R turbo engine 175hp. Available as 13-piece complete cooling kit and 3-piece turbo boost kit, temperature resistance -58°F to 356°F.

Current stock and fast shipping: 7 R21 Turbo items permanently in stock. Orders before 5 PM ship same day via GLS courier. Delivery 24-48 hours throughout Europe. Reinforced packaging for maximum protection.

Available R21 2.0 Turbo parts:

  • 13-piece cooling system complete kit with clamps
  • 3-piece turbo boost kit (clamps not included)
  • Individual water hoses positions 1 to 5
  • Reinforced turbo intake hose 5mm (4-ply)
  • Standard water hoses 4mm (3-ply)

Technical specifications: High-grade VMQ silicone, wall thickness 4mm (3-ply) water circuit, wall thickness 5mm (4-ply) turbo air circuit, continuous temperature -58°F to 356°F, rated pressure 43 PSI water / 29 PSI boost, stainless clamps included per item, black standard color (blue/red on request).

Vehicle compatibility: Renault R21 2.0 Turbo Phase 1 and 2 (1987-1994), F3R engine 1995cc turbo, power output 162-175hp depending on year, engine code F3R-720/724/728, direct plug-and-play installation.

R21 Turbo FAQ - Frequently Asked Questions

Which hoses fail first on the R21 Turbo? Water hoses positions 3 and 5 near the turbocharger experience highest thermal stress and deteriorate first. The turbo-to-intercooler intake hose also suffers from pressure/vacuum cycles. Our VMQ silicone hoses last 3 times longer than OEM rubber hoses thanks to multi-layer reinforced construction.

Does the 13-piece kit replace all water hoses? Yes, the 13-hose kit covers the entire R21 2.0 Turbo cooling system: radiator, thermostat, water pump, oil cooler, cabin heater. Each hose is pre-formed to exact OEM dimensions. Complete installation in 2-3 hours. High-quality stainless clamps included.

Will these hoses fit naturally aspirated R21? The cooling water hoses fit all R21 2.0L models (NA and turbo) as the cooling circuit is identical. Only the boost hoses are turbo-specific. Check your engine type: F3R turbo or F3N/F3P naturally aspirated.

What's the difference between 3-ply and 4-ply? 3-ply hoses (4mm) suffice for low-pressure water circuit (14-29 PSI). 4-ply hoses (5mm) are necessary for turbo air circuit subject to boost pressure variations (0-17 PSI). Multi-layer construction prevents collapse under vacuum and expansion under pressure.

Do the hoses improve performance? Silicone hoses maintain constant cross-section under pressure unlike deforming rubber, ensuring optimal flow. Better temperature resistance (-58°F to 356°F vs -22°F to 212°F OEM) enables stable operation even under intensive use. Indirect gain through increased reliability.

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