For the past 45 years, Ferrea Racing has been manufacturing hard core racing components for various types of engines in a wide range of categories worldwide.  The company uses the latest technological advances gained through the development of engine valve programs for Formula 1, Indy Car, NASCAR, Sprint Car, and Drag and Road racing teams.  This technology allows Ferrea Racing to provide the highest level of performance and reliability available in the industry.  Made in the USA.  Sold in sets of two.


The 5000 series valves have become the alternative for performance engine builders that use high quality and reliable valves while maintaining a cost effective solution.  These valves are machined in Ferrea's CNC machining centers allowing extremely tight tolerances and cost effective design.  They feature a one-piece forging made from stainless steel followed by by a special heat treatment process, then the stems and tips are hard chromed for extreme hardness.  Most applications are available in an undercut stem and dished head, while other applications are available in straight stem and flat head. These valves are designed for street performance engines, mildly modified drag and oval track, and motorcycle/ATV applications.


What is a Superflo valve?

The F0215 and F0216 (oversize) intake valves will fit Suzuki DRZ, LTZ, Kawasaki KLX, KFX, and Arctic Cat DVX ATV's and come in standard or oversize, they come in pairs.  Valve spring kits are sold in pairs and come complete with seats, titanium retainers, locators, and keepers.  These are available as a selectable option above, add yours now.  For detailed specifications on the valve spring kits please see our listing for the Ferrea Racing Valve Spring Kits.

 

Intake valves are available individually as well, please inquire.  The intake valves have the following specifications:

Valve Length Calculations

Valve lengths are calculated as overall length measurements.  This is the length of the valve from the stem-end tip of the valve to the combustion chamber face.  Many of the cylinder head manufacturers use a system that calls for valves to be +100, +250, etc.  This is an additional length added to a stock valves for that application and can sometimes create confusion, since some stock lengths have changed over the years due to slight OEM changes.  For the purpose of the Ferrea Racing Components catalog the following will be used as stock lengths for the most popular applications.  Understand that as Ferrea components are manufactured for the racing industry, many times margins and other measurements will differ from stock in order to create better flow characteristics and to improve durability.  As an engine builder or cylinder head assembler it is your obligation to check these specifications with your setup for that particular cylinder head and assure that proper geometry is obtained.  Many factors such as rocker armchoice and setup, seat machining, and valve spring installed height may create the need for a valve of different length than specified by either Ferrea Racing Components or the OEM manufacturer.

Use of the Ferrea spring kits is not mandatory but very highly recommended to take full advantage of the durability that these valves can offer.  Ferrea racing valves will fit ALL of the following applications:

• Arctic Cat DVX400 ATV, 2004-2008
• Kawasaki KLX 400, 2001-2008
• Kawasaki KFX400 ATV, 2001-2008
• Suzuki DRZ400, 2000-2012
• Suzuki LTZ400 ATV, 2000-2010

 

Don't forget your seals, also sold in pairs!