SneedSpeed R53 SR71 Coated & Ported Header w/ Cat – High-Performance Exhaust Upgrade

The SneedSpeed R53 SR71 Coated and Ported Header with Catalytic is designed for MINI Cooper S and JCW (R52/R53) enthusiasts who want improved performance, reduced heat, and a refined exhaust tone. The factory manifold limits flow and traps heat; this header solves both, combining racing technology with OEM reliability and street legality. This upgrade from SneedSpeed dramatically improves exhaust velocity and thermal efficiency for performance-focused MINI drivers.

Why Upgrade from the Factory Header?

The OEM R53 header is restrictive and prone to heat soak, limiting power and causing premature wear on nearby components. By upgrading to the SR71 system, you improve both performance and thermal management.

SR71 Engineering: Designed for Flow and Durability

Developed using race-tested principles, the SR71 header offers CNC-ported runners, a 4-into-1 collector, and a high-flow catalytic converter. Its 1500°F-rated ceramic coating controls heat while improving gas velocity, producing a clean, powerful exhaust tone.

Highlights:
• 4-into-1 collector for smooth scavenging
• CNC porting for seamless transitions
• High-temp ceramic coating for thermal stability
• 200-cell high-flow cat for emissions compliance
• Direct OEM fitment with no tuning required

Performance Gains You Can Feel

On a lightly modified MINI R53, the SR71 header provides measurable improvements: quicker throttle response, stronger mid-range torque, and up to 10–15 wheel horsepower over the stock manifold. Combined with pulley, intake, and tune upgrades, gains can reach 20+ whp.

Real-World Benefits:
• +10–15 whp average increase
• 20–25% better exhaust flow
• Up to 50°F lower engine bay temperatures
• Smoother top-end power delivery
• Deeper, more aggressive tone

Installation Overview

The SR71 Header is a direct bolt-on replacement for the R52/R53 MINI Cooper S and JCW. It uses OEM mounting points, sensors, and heat shields. Installation typically takes 2–3 hours with standard tools. Apply anti seize on O₂ sensors and torque to factory specs.

Thermal Control Advantages

The ceramic SR71 coating dramatically reduces under-hood temperatures, protecting nearby components like ignition coils, hoses, and intercooler piping. This also improves intake air temperature and engine efficiency, maintaining consistent power during long drives or track use.The SneedSpeed team is ready to help you maximize your MINI's performance.

Owner Feedback

MINI enthusiasts praise the SR71 header for its quality fitment and noticeable power increase:

“This header woke my R53 up — throttle response is instant, and it sounds incredible.” – Mike D.
“Perfect fit and finish. My under-hood temps dropped and the supercharger whine finally sings.” – Ryan T.
“Smoother powerband, more torque, and still passes emissions.” – Sarah L.

Final Verdict

The SneedSpeed R53 SR71 Coated & Ported Header w/ Cat is more than an exhaust mod—it’s a performance transformation. It increases power, reduces heat, enhances sound, and improves overall engine efficiency while keeping your MINI street legal. For anyone chasing true R53 performance, the SR71 is the header that delivers results. For support or installation guidance, contact us today  the SneedSpeed team is ready to help you maximize your MINI's performance.

■ Available now at https://sneedspeed.net/sneedspeed-r53-sr71-coated-and-ported-header-w-cat/