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Manley Performance Manley Ford Modular Coyote 5.0L Gen III Race Master Series Exhaust Valve Set - 1.260in Dia
Manley Performance Manley Ford Modular Coyote 5.0L Gen III Race Master Series Exhaust Valve Set - 1.260in Dia
Manley Performance Manley Ford Modular Coyote 5.0L Gen III Race Master Series Exhaust Valve Set - 1.260in Dia
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Manley Ford Modular Coyote 5.0L Gen III Race Master Series Exhaust Valve Set - 1.260in Dia

MAN12629-8
807298121093
Valves
20+ Units In Stock - Ships Next Business Day
$ 270.06 $ 202.55
$ 202.55

SKU: 12629-8 | UPC: 807298121093

Manley Race Master Series Exhaust Valve Set 1.260" 2011+ Ford Mustang Coyote 5.0L Gen III (8pcs)

The Manley 12629-8 Race Master Series Exhaust Valve Set delivers high exhaust flow and strength for 2011+ Ford Mustang Coyote 5.0L Gen III engines in GT Boss 302 Shelby GT350 GT500 and F-150 models. Machined from premium stainless steel with 1.260in head diameter these valves handle high RPM up to 8000+ in naturally aspirated supercharged or turbo setups. Swirl polished stems and hardened tips ensure reliability in race conditions.

Key Features

  • 1.260" Head Diameter: Matches Coyote 5.0L Gen III ports for increased exhaust flow and horsepower gains
  • Premium Stainless Steel: Resists high exhaust temperatures and maintains shape under extreme stress
  • Swirl-Polished Stems: Minimizes friction and guides flow smoothly for better efficiency
  • Fully Machined Combustion Face: Seals tightly and promotes even heat dissipation
  • Hardened Tip Ends: Withstands aggressive valve train wear from high lift cams

Product Notes

  • Sold as complete set of 8 for one cylinder head upgrade
  • Pair with matching Manley intake valves springs and retainers
  • Made in United States with limited manufacturer warranty

Installation Notes

  • Professional installation recommended.
  • Requires cylinder head removal valve job and seating
  • Use with upgraded valve springs retainers and full valvetrain check

This Part Fits

Year Make Model Submodel
2011-2014 Ford Mustang GT 5.0L Coyote V8
2012-2013 Ford Mustang Boss 302 5.0L Coyote V8
2015-2017 Ford Mustang GT 5.0L Coyote V8
2018-2023 Ford Mustang GT 5.0L Coyote Gen 3 V8
2016-2020 Ford Mustang Shelby GT350 5.2L Voodoo (Coyote based)
2020-2022 Ford Mustang Shelby GT500 5.2L Predator (Coyote based)
2011+ Ford F-150 5.0L Coyote V8

Why Choose Manley?

  • Proven in motorsport with decades of engine building experience
  • Precision CNC machining for exact fit and performance
  • Engineered specifically for Ford Coyote engines in race applications

Frequently Asked Questions

  • Q: Does this fit 2018-2023 Mustang GT 5.0L Coyote Gen 3?
    A: Yes 12629-8 fits all 2011+ Coyote 5.0L Gen 1-3 in Mustang GT Boss 302 Shelby and F-150.
  • Q: What material are these exhaust valves?
    A: Premium stainless steel with swirl polished stems hardened tips and machined faces for heat and wear resistance.
  • Q: Is valve job or new springs needed?
    A: Yes requires professional head work upgraded springs retainers and break-in procedure for high RPM use.

Shipping & Handling

  • Method: UPS/FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure retail box 10x6x2 inches
  • Weight: 2.1 lbs

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