CPe S54 Cylinder Head Stage 2

S54 Stage 2 Performance Cylinder Head

The stage 2 head is for someone looking to run constant high engine speeds in a race application or street. These Feature a full Ferrea valvetrain able to run RPM's in excess of 8500 with a sense of reliability. These include titanium retainers and should be inspected seasonally for wear in severe applications and yearly for street use.  

Our Stage Two Cylinder Heads feature the following:

• Full Disassembly & Cleaning 
  • Inspect & Blueprint All Components For Irregular Wear
• Leak and Crack Test Pressure Test
• High Performance Five Angle Valve Job
• Trueness Checked & Resurfaced Mating Surface
  • Surface Finish/Roughness Exceeds OE Spec
• Attention to Potential Hot-spot Areas and Chamfering
• Unshroud the Valves in Combustion Chamber
  
• New OE Valve Stem Seals
• Ferrea Dual Valve Spring Set w/ Ti Retainers
• Ferrea Intake/Exhaust Valves 
• Manganese Bronze Valve Guides

Type/Material/Application: Dual Spring - Endurance - Special Alloy
Outside Diameter: 20.8 mm/28.0 mm
Inside Diameter: 16.51 mm/20.8 mm
Seat Pressure: 85 lbs @ 41 mm
Open Pressure: 185 lbs @ 31 mm
Rate Inch: 254 lbs
Coil Bind: 26.5 mm
Max Net Lift: 14.0 mm

Exhaust Valve
Head Diameter: 30.5 mm
Stem Diameter: 5.96 mm
Overall Length: 119.2 mm
Tip Length: 1.1 mm
Reference: 30 Degree Flo. Stock size. Triple Radial Groove. Super Alloy

Intake Valve
Head Diameter: 35mm
Stem Diameter: 5.98mm
Overall Length: 117.6mm
Tip Length: 1.2mm
Reference: 19 Degree Super Flo. Stock size. 30 Degree backcut. Triple Groove

Valve guides and valves will be checked, if replacement is needed it is done at additional cost of $25 per valve guide.

• A Core cylinder head is required for all head work - Cores are available for exchange service