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.  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:

Ai 230cc TFS LSx w/ .660" BTR Dual Spring Kit w/ Titanium Retainers - Cost: $2595
Ai 230cc TFS LSx w/ .700" Manley Nextek Dual Spring Kit w/ Titanium Retainers - Cost: $2795
Ai 230cc TFS LSx w/ .800" Manley Nextek Dual Spring Kit w/ Titanium Retainers - Cost: $2895

Labor and Component Options:

Powdered Metal Guides for longer guide life w/ OE rockers. - Cost: $100
CompCams 19024-16 1.72 Ratio ARC Series UltraGold Aluminum Rockers - Cost: $495
T&D 1.7 Ratio Adjustable Shaft Mounted Aluminum Rocker Set - Cost: Varies w/ options
Jesel 1.7-1.8 Ratio Pro Series Shaft Mounted Aluminum Rocker Set - Cost: Varies w/ options

• Ai 230cc CNC'd TFS Heads including new castings
• .660" BTR Dual Spring Kit w/ Titanium Retainers
• Any Chamber Volume 64fcc & under, or Ai optimized for cam selection
• Any HR Camshaft - Ai Custom Grind, or you may specify a grind yourself
• In-house QC inspection of your individual camshaft
  
  
• Typically manages 470-520rwhp SAE corrected
  
  Cost: $2995 + Shipping

Please Contact Us for shipping & turnaround quotes!