(27mm / 25mm OEM Head Diameter )

These Valves will create a tighter spring installed height. They will 

add approx .062 more load on the springs which in turn allow for more RPM's before valve float.. 

Actual RPM gain will vary depending on carburetor quality.. These valves are  a perfect fit,, as well as looks etc..

WE now have OEM Valve Springs that are exact replacement fit as for appearence, wire size etc. These are not the cheater 10.8 springs and will look exact OEM..  At .650 Lift check they are producing approx 1.5 lb stronger tension..  With the add on of these spring to the valves also mentioned in this ad you should produce approx 200-300 usable RPM's / and making power.. Under normal tech situations they will pass right through tech...

These Valves & Springs are designed for the Pure Stock (Box Stock) Predator Class where you are suppose to be running ONLY OEM stock parts,,springs,,carb,,valves etc etc..

The kit consist of

* Trick Valves and Springs

* OEM Hem Head (.045) & Valve Cover Gasket