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Maximize your legendary B5 Audi S4's cooling performance with this race-proven all-aluminum high-performance radiator engineered specifically for 1997-2002 models. Purpose-built for the twin-turbocharged 2.7L V6 biturbo engine, this radiator features CSF's advanced B-Tube technology delivering 15% superior heat transfer efficiency critical for handling boost and aggressive tuning. The heavy-duty 2-row 42mm aluminum core significantly increases cooling capacity over fragile factory plastic-tank radiators notorious for failure on aging B5 platforms, essential for modified engines producing serious power. Military-grade aluminum construction with precision TIG-welded end tanks eliminates the weak crimped plastic joints that commonly crack on high-mileage S4s, ensuring leak-free performance through years of spirited driving. Ultra-efficient multi-louvered fins are wind-tunnel tested to maximize heat dissipation during high-boost acceleration, track use, and aggressive street driving. Drop-in fitment requires zero modifications and accepts all OEM quick-connect hoses, fans, and mounting hardware.
Essential upgrade for stage 2+ tuned B5 S4s with upgraded turbos, intercoolers, and aggressive tuning files. Eliminates overheating issues during track days, autocross, and spirited canyon runs common with factory cooling. Perfect for builds producing 400+ horsepower at the wheels demanding bulletproof cooling reliability. Prevents catastrophic engine damage from cooling system failure that destroys expensive built motors. Replace aging factory radiators proactively before they fail and leave you with massive repair bills. Maintains optimal coolant temperatures for consistent boost and power delivery without heat soak. Professional-grade cooling solution trusted by Audi tuning specialists and B5 enthusiasts. Protects your investment in one of Audi's most iconic performance sedans and ensures reliable operation during demanding high-performance driving applications.
