If you're looking to upgrade your engine's performance, the Manley Valve - Exhaust, Valve-R/M 1.625,+.100 is a fantastic choice. Designed for automotive applications, this valve is engineered to enhance your vehicle's exhaust flow, making it a perfect fit for high-performance builds.
The Manley 11303-1 exhaust valve is crafted to meet the demands of performance enthusiasts. Its precise dimensions and robust construction ensure that it can handle the high temperatures and pressures typical in performance applications. With a head diameter of 1.625 inches, this valve is designed to optimize airflow, which can lead to improved engine efficiency and power output.
This exhaust valve is designed to be universally compatible, but it's always a good idea to verify your specific vehicle's requirements. Whether you're working on a standard engine or a modified setup, the Manley 11303-1 can be a solid choice. Make sure to consult your vehicle's manual or a trusted mechanic to ensure compatibility.
Many users have praised the Manley 11303-1 for its quality and performance. Here’s what some customers are saying:
Upgrading to the Manley Valve - Exhaust, Valve-R/M 1.625,+.100 is a smart move for anyone serious about performance. With its durable construction and excellent design, this valve is sure to meet your needs and exceed your expectations. Don't forget to check the fitment for your specific vehicle to ensure you get the most out of your upgrade!
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Manley Performance, formerly called Manley Speed Equipment, was established in 1966 by Hank Manley shortly after his graduation from Brown University. His interest in the performance and racing traced back to 1960 when, at age 17, he rebuilt a 312 CID Ford V8 engine, installed a camshaft and three two-barrel carbs, and raced a ’56 Thunderbird on New Jersey’s streets. Initially, the company’s product lineup included stainless valves, lifters, camshafts, forged pistons, vanadium valve springs, pushrods, and timing chain kits. By 1998, Manley had outgrown its first Bloomfield, New Jersey facility and bought several acres in Lakewood, New Jersey. It was around this time that the brand’s name formally changed to Manley Performance. Nearly a decade later, the production space doubled in size.
Evolving in the Automotive SpaceLed by GM Michael Tokarchik in 2002, Manley entered the high-performance passenger car market as an OEM supplier of connecting rods for the 2003/2004 Ford SVT Mustang Cobra. Production reached 2500 rods per week without missing a single delivery date. Ford awarded Manley its highest ever supplier rating. Manley’s presence in the OEM market continued from there as a supplier for the Ford GT. After nearly 50 years since its inception, Manley continues to be globally recognized as the leading manufacturer of performance valves, connecting rods, cylinder head components, pushrods, drive and oil systems, and several other engine parts.
What is Manley’s Specialty?Manley Performance specializes in high-performance engine internals that range from stock replacements to full-on race applications. They have been the standard of the industry since their inception; a fact that still remains true now as they have ventured into new markets. Today, Manley Performance continues to re-define itself in a high-performance aftermarket industry that is constantly evolving. The brand has developed a wide range of new products for growing markets that include sport compact, Ford modular, and Chevy LS. Manley also maintains its leadership role with the traditional V8 engine business.
Get Manley Performance at Vivid RacingIf you are in need of a serious upgrade to your engine, then Manley Performance parts should be on your list. Like all of our suggested manufacturers, Manley uses the best materials available to ensure a quality part for your engine. We carry Manley connecting rods, crankshafts, pistons, and valve components. The large lineup of domestic parts includes sport compact vehicles, Ford modular engines, GM’s LS series internals, and HEMI product upgrades for Chrysler.
If you can’t find what you’re looking for or need help choosing the right part for your car, call our sales team at (480) 966-3040. We are here to make your buying experience a breeze.