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4.6L / 5.4L 3V Stage 3 CNC Competition Ported Cylinder Head Package

Stage 3 CNC Competition Porting Package - Stage 3 CNC Porting Program, Bronze Valve Guides, Performance 5 Angle Valve Job, Manely +1mm Oversize Beadloc Groove Valves, Stage 3 PAC Valve Springs, Viton Stem Seals, Surfacing and Assembly
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MHS 4.6L / 5.4L 3V Stage 3 CNC Competition Porting Package - 295 CFM Intake / 198 CFM Exhaust 

Short and Sweet description - The Ultimate 3V Cylinder Head Package - Stage 3 CNC Porting Program, Blended Bowls to Seats, Competition 5 Angle Valve Job, Oversized Seats, +1mm Manley BeadLoc Single Groove Valves, PAC Stage 3 Valve Springs and Retainers, Viton Stem Seals, Surfaced and Assembled

Not so short description
We start by disassembling the heads, thoroughly inspecting them for any possible damage, removing all oil galley plugs and freeze plugs, removing the old valve guides, deep cleaning them and bead blasting the ports and chambers to remove any additional carbon deposits. The heads are then ran through our Stage 3 CNC Porting and Chamber Programs, then moved over to our Seat and Guide area where our custom Bronze Guides are installed and honed to size. We then install oversized valve seats and perform our Competition 5 Angle Valve Job. The Heads are then surfaced on our CBN / PCD Surfacer and Assembled with our Viton Valve Stem Seals, Manley +1mm Oversize BeadLoc Single Groove Valves and our Stage 3 PAC RPM Series Valve Springs. Heads will also be assembled with new USA Made Brass Freeze Plugs and New Oil Gallery Plugs. 

Cylinder Heads are to be sent in with camshafts, lash adjusters and followers removed. If you would like to leave them in the cylinder heads, we can clean all the parts, polish up the camshafts and re-install everything for an additional cost. You will also have the option for us to install new OEM Lash Adjusters which is also a good idea. 

*These heads will require the Camshaft Phasers to be locked out due to the amount of spring pressure. 


  • Disassembly and Cleaning of all Parts
  • Bead Blasting of Ports and Chambers 
  • Stage 3 CNC Porting Program - Hand Blended Bowls to Seats 
  • MHS Bronze Valve Guides - Honed to Size
  • Competition 5 Angle Valve Job
  • Oversized Valve Seats 
  • Manley +1mm Oversize Valves- Stainless Steel Intake, Inconel Exhaust 
  • PAC Stage 3 RPM Series Valve Springs and Retainers 
  • CBN Surfacing 
  • New Viton Valve Stem Seals 
  • New Brass Freeze Plugs and Oil Gallery Plugs 
  • Assembly

SHIPPING- After your order is received, we will ship out a set of Cylinder Head Boxes to you with Pre-Paid Return Labels, all the proper packaging and packaging instructions to ensure your heads arrive safely. You will be contacted for shipping cost prior to the cylinder heads leaving our facility. 

You are responsible for the freight once the heads are completed. 


  • Modular Head Shop
  • New


Shipping Information

  • Item Requires Shipping
  • 100.0 lbs.
  • W24.0000” x H12.0000” x L12.0000”
  • Free Shipping!

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