Chromoly HD pushrods resist bending and deflection under high boost, high back pressure and high rpms. Chromoly HD retainers have much higher holding strength vs stock, great insurance, espaecailly when using HD springs.
HD valve springs for use with high boost, backpressure and rpms. These have been proven at over 90 psi of boost and 5500+ rpms.
**Save money by buying in packages!!**
|Ford||Superduty||6.0||2003 - 2007|
|Ford||Superduty||6.4||2008 - 2010|