Advanced Induction Cylinder Head Development
Ai GM 821 LS3 Performance Rebuild Cylinder Head Package

Our Performance Rebuild suite of inspection and machine work is a great option for the value minded.  Even in as cast form the GM LS3 castings are capable of producing impressive power levels.  If you are building a budget 475-550hp setup, it is difficult to beat the value of bringing the factory head back into better than new condition.  Our precision valve grinding and CNC'd valve jobs are a great way to pick up some power and ensure your heads are ready to go for tens of thousands of miles.

Pricing is for work applied to a pair (2) of cylinder head castings and components YOU supply unless otherwise noted.  We are happy to build your heads with whichever spring kit, valve, etc. you would like.

Machining & Labor Operations:
  • Disassembly, Cleaning, and Inspection
  • 100% CNC Professional Competition Quality Valvejob
  • OEM Valves Cleaned & Precision Ground
  • PCD milled to ensure flatness, surface finish, & achieve desired chamber volume (60 - 70cc)
  • Fully Hand Deburred
  • Professional Assembly by Ai if desired
Machining & Labor Cost: $595

Labor and Component Options:

Replace OEM guides with Full Bronze Guides & hone to ideal clearances - Cost: $250
Bronze Guide Liners installed & honed to ideal clearances to refurbish worn out guides. - Cost: $125
Milling valve cover rail, exhaust, and intake flanges to ensure flatness & surface finish. - Cost: $60

PSI 1511 MaxLife Endurance Spring Kit w/ OEM Replacement Seals. - Cost: $250
Manley 23622 Titanium Retainers for OEM, PAC, PSI, etc. beehive springs - Cost: $195
Lunati Gold dual valve spring kit w/ lightweight steel retainers.  Lift capacity to .660" - Cost: $225

Manley 221436 Nextek .660" shot peened & fully polished Dual Spring Kit:
    221436-16 Dual Springs
    23623-16 Titanium Retainers
    42334-16 Hardened Spring Locators
    13098-16 Precision Machined Locks
    Steel jacketed Viton seals for dual springs

    Cost: $525 bought w/ head work (This is a premium setup that is ~$700 shipped from Summit)

Please Contact Us for shipping & turnaround quotes!