Our 230cc CNC'd head based on TFS' aftermarket castings is designed for 4.000" and larger bore LSx applications.  This CNC work can also be applied to the TFS "220cc As Cast" heads.  You can either run an aftermarket rocker arm or the OEM 1.7 GM rocker arms.  Street & higher mileage builds w/ the GM rocker should run the Powdered Metal Guide option.  Smaller & larger versions available. More info & photos will be added soon.  Thanks!

Pricing below includes TFS' aftermarket LSx castings as a base for our CNC work & components.


Machining & Labor:

• 100% CNC Ported Intake runners
• 100% CNC Ported Exhaust runners
• 100% CNC Unshrouded & Contoured Chambers
• 100% CNC Professional Competition Quality Valvejob
• Precision Grind & Back Cut 2.055" & 1.575" Valves
• PCD milled to ensure flatness, surface finish, & achieve desired chamber volume (50 - 64 cc)
• Professionally assembled for your specific intended use, camshaft, & valve train setup

Components:

• Trick Flow LSx Bare "Porter" Castings w/ added material to accommodate our designs.
• Spring Kit of Your Choice
• Ferrea Stainlelss Steel 2.055" & 1.575" Valves

Pricing using new TFS "Porter" castings:

Full CNC & Machining w/ .660" BTR Dual Spring Kit w/ Titanium Retainers - Cost: $3595
Full CNC & Machining w/ .700" Manley Nextek Dual Spring Kit w/ Titanium Retainers - Cost: $3795
Full CNC & Machining w/ .800" Manley Nextek Dual Spring Kit w/ Titanium Retainers - Cost: $3895

Pricing using TFS "Fast As-Cast" 220cc Assembly:

Full CNC & Machining using New TFS 220cc As-Cast Assembled Heads instead of "porter" castings - Cost: $3395
Full CNC & Machining applied to TFS 220cc As-Cast heads you send in - Cost: $1595 if New & $1795 if Used

Labor and Component Options:

Powdered Metal Guides for longer guide life w/ OE rockers. - Cost: $300

Please Contact Us for shipping & turnaround quotes!