Manley Intake Valves SBF R/F 1.850in - Part Number 11578-8
If you're looking to boost your engine's performance, the Manley Intake Valves SBF R/F 1.850in (Part Number 11578-8) is a fantastic choice for your Ford 289, 302, and 351W engines. These valves are designed for serious enthusiasts who want to take their vehicle to the next level.
Key Features
- Race Flo Valves: Engineered with rail-type rockers for optimal performance.
- Chrome Stems: Durable chrome stems ensure long-lasting functionality.
- Hard Tips: Enhanced durability for high-performance applications.
- Swirl Polished & Fully Machined: These valves are meticulously crafted for improved airflow and efficiency.
Why Choose Manley Intake Valves?
When it comes to performance, the Manley Intake Valves are built to meet the demands of high-performance engines. The combination of chrome stems and hard tips means these valves can withstand the rigors of racing while providing reliable operation. The swirl polishing process enhances airflow, which is critical for maximizing your engine's potential.
Specifications
- Part Number: 11578-8
- Type: Intake Valve
- Diameter: 1.850 inches
- Compatible Engines: Ford 289, 302, 351W
Fitment Information
The Manley Intake Valves are specifically designed for use in Ford 289, 302, and 351W engines. If you're upgrading your engine or building a performance setup, these valves are a perfect fit. They help improve the overall efficiency and power output, making them a great addition to your performance parts list.
Customer Reviews
Customers have praised the Manley Intake Valves for their quality and performance. Many users report noticeable improvements in throttle response and overall engine performance. With positive feedback highlighting their durability and design, it's clear that these valves are a trusted choice among automotive enthusiasts.
Upgrade your engine with the Manley Intake Valves SBF R/F 1.850in (Part Number 11578-8) and experience the difference in your vehicle's performance. These valves are not just parts; they're a step towards achieving your automotive goals.
⚠ 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.
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