Based on GM's largest reverse cooled casting, this package has the capacity to generate 10 - 20 hp over our proven 200 cc CNC'd GM LT1 offering.

Machining & Labor:

• 100% CNC Ported Intake & Exhaust runners
• 100% CNC Unshrouded & Contoured Chambers
• 100% CNC Professional Competition Quality Valvejob
• Precision Grind & Back Cut OEM 2.00" & 1.55" Valves
• Re-Machined Intake, Exhaust Flanges, & Valve Cover Rails
• Both Pressure and Hardness tested to ensure the casting's integrity & ability to seal
• PCD milled to ensure flatness, surface finish, & achieve desired chamber volume (54 - 60 cc)
• Professionally assembled for your specific intended use, camshaft, & valve train setup

Components:

• Manley Super Finished .650" Lift Nextek Springs
• Ai Custom Machined & Hardened Chrome Moly Locators
• Genuine CompCams Machined & Hardened 10 deg Retainers and Locks
• OEM Quality Steel Jacketed Viton Seals

Cost: $1395 for labor, CNC work, and components listed above applied to your GM LT castings


Labor and Component Options:
Install K-Line Bronze Guide Liners & hone to ideal clearances - Cost: +$125
Ai 2.00" Int & 1.56" Exh Custom Stainless valves for SR or high EGT applications - Cost: +$215
PSI .700"+ solid roller dual springs w/ Xceldyne Ti-17 Retainers & locks - Cost: +$695

Add an Ai Billet Core Custom grind camshaft for $395 when bought w/ head work!


Recommended Usage: Stock 350 cid - 396 cid short blocks with piston relief/dish volumes of 5-16 cc.  Finished chamber size after milling is 54 - 60 cc depending upon application.  If a volume is not specified, we will automatically mill your order to 56 cc.