Rev Kits

When operating at high RPM it is advisable to replace the standard production valve spring with a heavy-duty valve spring.

Benefits when installed correctly :
Avoid Coil Bind
Avoid valve bounce
Avoid valve spring failure
Avoid valve damage
Avoid power loss

A standard valve spring has a pressure rating of around 80lbs pressure fully compressed
A Competition Valve Spring has a rating of around 196lbs pressure fully compressed, at seating pressure the Competition Valve Spring has a pressure rating of around 80lbs pressure.

The STK Competition valve spring kit is manufactured from high-Quality Chrome silicone and can handle a pounding up to 9000rpm.
Coupled with a Lightweight Titanium or Chromoly Valve Spring retainer allows for improved harmonics.
In most cases, a lower steel valve spring seat is provided to prevent damage to the cylinder head due to the high force of the Competition Valve Spring.
It is advisable to fit the STK Stainless Steel Billet Valve Set for extended reliability and improved flow rates.