Ford Performance BOSS 302R Valve Spring Kit – Gen 1 Coyote / FPV 335 Miami 5.0L

Ford Performance BOSS 302R Valve Spring Kit – M-6513-M50BR

The Ford Performance M-6513-M50BR BOSS 302R Valve Spring Kit is engineered for high-lift, high-RPM use, making it a top choice for naturally aspirated or mild forced-induction Gen 1 Coyote builds. Originally developed for the BOSS 302R race program, this kit is also fully compatible with the Aussie FGX FPV 335 Miami 5.0L DOHC engine.

Built to handle up to 13mm cam lift and 8000 RPM, these springs provide reliable valve control and durability in performance applications. Perfect as a direct-fit upgrade for 2011–2014 Mustang GT heads or any Gen 1 Coyote-based setup.

🔧 Use with Coyote Valve Spring Compressor Tool for best installation results.

✅ Features:

• Fits FGX FPV 335 Miami 5.0L DOHC heads

• Compatible with Mustang GT (2011–2014) and BOSS 302

• Designed for camshafts up to 13mm lift

• Supports engine speeds up to 8000 RPM

• OEM fitment with race-proven performance

• Includes 16 premium valve springs

⚙️ Specifications:

• Engine Fitment: Gen 1 Coyote 5.0L, FPV Miami 335 5.0L

• Valve Lift Capability: Up to 13mm

• Max RPM: 8000

• Kit Contents: 16 Valve Springs

• Part Number: M-6513-M50BR