GSC Power Division Exhaust Valve – +1MM Oversize Stainless Steel, Set of 8 for 5.0L Coyote Gen 1/2 - GSC2153-8
Designed for 2011–2017 Ford Mustang GT and F-150 models equipped with the 5.0L Coyote Gen 1/2 engine, this set of eight +1MM oversize exhaust valves from GSC Power Division delivers enhanced flow and durability for high-performance applications. Each valve features a 45° seat contact angle—unlike the OEM’s 40° spec—requiring a valve job to ensure proper sealing and valvetrain geometry.
GSC uses advanced 3D modeling and simulation to engineer a high-flow valve head that resists distortion under extreme conditions. Prototype heads are flow-tested in real-world setups to confirm maximum performance and reliability.
Key Features:
- Back-Cut Head Design: Reduces valve mass to support higher RPM operation
- Micro-Polished Valve Stems: Lowers oil retention and drag for smoother guide movement
- Premium Stainless Steel: Made from modified 23-8n alloy for strength and heat resistance
- Stellite-Tipped Ends: Hardened or fused tips maintain geometry and resist wear within 5 Rockwell C
- Balanced Keeper Groove: Calibrated to equalize spring pressure and reduce shim requirements
- OEM-Compatible Locks: Works with factory keeper systems; new locks recommended for performance builds
- Built for Reliability: Backed by GSC’s commitment to precision and long-term performance
Valve Dimensions:
- Head Diameter: 1.289 in / 32.75 mm
- Total Length: 4.272 in / 108.5 mm
- Stem Diameter: 0.235 in / 5.96 mm
- Sold as a complete set of 8
- Part #: GSC2153-8
Fitment:
- 2011 Ford Mustang GT
- 2012 Ford Mustang GT
- 2013 Ford Mustang GT
- 2014 Ford Mustang GT
- 2012 Ford Mustang Boss 302
- 2013 Ford Mustang Boss 302
- 2015 Ford Mustang GT
- 2016 Ford Mustang GT
- 2017 Ford Mustang GT
- 2011 Ford F-150 5.0L
- 2012 Ford F-150 5.0L
- 2013 Ford F-150 5.0L
- 2014 Ford F-150 5.0L
- 2015 Ford F-150 5.0L
- 2016 Ford F-150 5.0L
- 2017 Ford F-150 5.0L
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
