The CNC'd GM LS7 head is adequate for producing average power straight from the factory.  However, it is an entry level part that suffers from the relative inconsistency of large scale mass production.  Our latest offering is an excellent option for someone who already owns the CNC'd GM LS7 cylinder head.  Without a great deal of investment we are able to apply a superior port design.  Significantly increased performance coupled with vastly superior finish and consistency make this a phenomenally attractive piece for high end builders.  We can accommodate any application from utilizing factory GM components to all out road or drag race packages.  From 600 rwhp daily drivers to 700 rwhp race engines, this is a versatile and proven performer.

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:

• 100% CNC Ported Intake, Exhaust, & Combustion Chambers
• 100% CNC Professional Competition Quality Valvejob
• Valves Cleaned & Precision Ground whether using new aftermarket or re-using OE GM
• PCD milled to ensure flatness, surface finish, & achieve desired chamber volume (60 - 73 cc)
• Customer can specify milling to an Available P2V Clearance relative to stock (e.g. .018" less P2V)
• Intake Flange, Exhaust Flange, and Valve Cover Rail PCD Milled to new surface finish specs
• Complete Deburring of entire head by hand, including chambers
• Thorough Inspection of Castings, Components, Bind Heights for your individual set of springs, etc.
• Complete Cleaning/Prep including Bead Blasting + UltraSonic to ensure internal passages are clear & free of debris
• Professionally Setup & Assembled for your individual application - Ready to bolt-on & Run

Machining & Labor Cost: $1995


Labor and Component Options:

Suggested Setup - Full Bronze Guides + an appropriate Exhaust Valve & spring setup for your given application. Typically, the Manley "Race Series" for NA or mild power adder apps.  High EGT "Severe Duty," or Inconel, for frequent n2o use, turbo, & marine apps.  Hollow Ferrea option for aggressive NA, or to increase over-rev safety margin.  Regarding spring options, the common BTR spring kit with Ti retainers is a great entry level option.  The Manley setups are a little nicer, and PSI's are the best spring available.  Our 'Ultimate HR Kit' is easily the nicest, lightest option, using my lightweight tool steel retainer, top-lock style fully machined & hardened locks, and either new OE GM seal/locators, or separate hardened locators & seals.  Other setups are available for racier applications (e.g. PSI duals & Xceldyne components, Jesel rocker systems, etc.).  All of these will be set up ideally to ensure you maximize the potential that any given components offer.

Replace OEM guides with Ai Pro Racing Quality Full Bronze Guides & hone to ideal clearances - Cost: $295
Install Bronze Guide Liners installed & honed to ideal clearances to refurbish worn out guides - Cost: $250
Replace OEM guides with Ai Pro Racing Quality Custom Guides - Material & Dimensions per application - Cost: Quoted Per App
MicroPolish OEM GM DelWest Intake Valves - Cost: $160

Manley Race Series Stainless Exhaust Valves - Cost: $185
Ferrea Super-Alloy Inconel High EGT Exhaust Valves - Cost: $385
Ferrea Hollow Stemmed Lightweight Stainless Exhaust Valves - Cost: $460
New OE GM DelWest manufactured CrN coated Ti Intake Valves - Cost: Varies ~$110-$135ea
Manley / Victory Valves CrN coated Titanium Intake Valves w/ or w/o integral Hard Tips - Cost: $1395
Premium Ai Custom Titanium Intake Valves, fully coated, fully optioned, designed per app - Cost: $1495-$1995

Ai PSI 1511 MaxLife Endurance Springs w/ Hardened Steel Locators & Viton Seals. 100% QC - Cost: $385
Ai PSI 1515/1516 High Lift MaxLife Endurance Springs w/ Hardened Steel Locators & Viton Seals. 100% QC - Cost: $410
Ai Ultimate HR Kit w/ PSI MaxLife High Lift springs + Ai Lwt Tool Steel Retainers, Machined Locks, Locators, 100% QC - Cost: $600
Ai Pro-Series PSI Dual Spring Kit w/ Professional Racing Quality Components, .6XX" Lift w/ Stock Rockers. 100% QC - Cost: $995
Ai Pro-Series PSI Dual Spring Kit w/ Professional Racing Quality Components, .6XX"-.7XX" Lift HR or SR. 100% QC - Cost: $1195

Ai Lightweight Tool Steel Retainers for beehive style springs. Lighter than Ti Dual Spring Retainers - Cost: $195
Manley Titanium Retainers for OEM, PAC, PSI, etc. beehive style springs - Cost: $235
BTR .660" Polished Dual Spring Kit w/ locators, viton seals, & Titanium Retainers - Cost: $310
Manley Nextek .660" rated shot peened & polished Dual Spring Kit w/ Titanium Retainers - Cost: $435
Manley Nextek .700" rated shot peened & polished Dual Spring Kit w/ Titanium Retainers - Cost: $735
Manley Nextek .800" rated shot peened & polished Dual Spring Kit w/ Titanium Retainers - Cost: $860

Jesel Rocker Systems & other components are available.  Solid roller builds for street / endurance, road race, or drag specific applications are available.


Please Contact Us for shipping & turnaround quotes!