Advanced Induction Cylinder Head Development
New Additions** Ai Aftermarket Casting Based Cylinder Heads:

223cc CNC'd Dart/RHS Cathedral
230cc CNC'd TFS Cathedral


Ai GM CNC Porting Options by Casting # & Engine Type:
243/317/799 LS6/LS2 , 241/853/806 LS1 , 821/LS3 , 823/L92 , 706/862/5.3 LS1 , 8452/LS7


GM 243, 799, & 317 LS2/LS6 Options:
   
Performance Rebuild Package

Our Performance Rebuild option includes our high end CNC'd valve jobs, precision valve grinding, milling to any chamber volume, cleaning, inspection, and professional assembly. Typical gains are 10-20rwhp.
   
218cc CNC Porting Package

Gain a typical 20-30rwhp over the unmodified GM 243 along with the benefit of a complete professional rebuild.
   
226cc Full CNC Porting Package

The go-to head for 450-500rwhp 5.7/6L's. Our high end machine work applied to GM's best cathedral head represents a phenomenal value to enthusiasts and serious competitors alike.
   
232cc Full CNC Porting Package

A slightly larger version of our proven 226cc full CNC work with excellent "clean up" and the potential to make another few HP.
   
GM 241, 853, & 806 LS1 Options:
   
Performance Rebuild Package

Our Performance Rebuild option includes our high end CNC'd valve jobs, precision valve grinding, milling to any chamber volume, cleaning, inspection, and professional assembly. Typical gains are 10-20rwhp.
   
205cc CNC Porting Package

Gain a typical 20-30rwhp over the unmodified GM 241 along with the benefit of a complete professional rebuild.
   
219cc Full CNC Porting Package

The often overlooked 241 is still capable of making great power with our high end CNC work applied to it. Typical gains are 35-45rwhp over the unmodified 241, and most 346cid LS1's manage 430-460rwhp SAE.
   
High CR 219cc Full CNC Porting Package

The only GM 241 porting option on the market capable of generating high compression while retaining the P2V necessary to run large cams. Generates 11:1 on 346's at stock P2V; up to 12:1 CR on stock 346cid LS1's.
   
GM 821 LS3 Options:
   
Performance Rebuild Package

Our Performance Rebuild option includes our high end CNC'd valve jobs, precision valve grinding, milling to any chamber volume, cleaning, inspection, and professional assembly.
   
260cc CNC Porting Package

Our Budget CNC porting for LS3's alleviates the primary restrictions in the head. Typical gains are 15-30rwhp, along with the benefit of a complete professional rebuild.
   
270, 275, 280cc Full CNC Porting Package

Our Full CNC porting for GM 821 LS3's is available in several port sizes. Typical gains on LS3's are 25-40rwhp for 500rwhp+ with daily drivable HR cams. Proven capable of supporting 700hp+ on 408cid+.
   
GM 823 L92 Options:
   
Performance Rebuild Package

Our Performance Rebuild option includes our high end CNC'd valve jobs, precision valve grinding, milling to any chamber volume, cleaning, inspection, and professional assembly.
   
260cc CNC Porting Package

Our Budget CNC porting for GM L92's alleviates the primary restrictions in the head. Typical gains are 15-30rwhp, along with the benefit of a complete professional rebuild.
   
267cc Full CNC Porting Package

Our Full CNC porting for GM 823 L92's is a great budget head for 600hp+ builds. Proven capable of supporting 700hp+ on 408cid+.
   
GM 706/862 5.3L LS1 Options:
   
218cc Full CNC Porting Package

For those looking for a high compression capable 3.900" bore option based on a GM casting our CNC'd 5.3 is a great option. Typical 346cid output with daily drivable HR's is 440-480rwhp SAE.
   
GM 8452 LS7 Options:
   
Performance Rebuild Package

Our Performance Rebuild option includes our high end CNC'd valve jobs, precision valve grinding, milling to any chamber volume, cleaning, inspection, and professional assembly.
   
260cc CNC Porting Package

Our Budget CNC porting for GM CNC'd LS7 alleviates the primary restrictions in the head. A great option for those looking for a bit more power, along with the benefit of a complete professional rebuild.
   
280cc Full CNC Porting Package

Our most powerful GM casting based LS head. Typical stock short block LS7's manage 590-640rwhp SAE with daily drivable hydraulic cam grinds. Proven capable of supporting 700-800hp NA with readily available manifolds, including the OEM GM LS7 manifold.