Precision Race Components all new cylinder head castings completed with 220cc runners. For stock cubic inch 4.8/5.3/LS1/LS2 applications requiring a stock valve angle LS cylinder head with extra thick decks comparable to stock piston to valve.

Features:

• 220cc Intake Runners
• 84cc Exhaust Runners
• Designed as a bolt on cylinder head with minimal change to pushrod length
• TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
• 64cc CNC Machined Chambers
• CHE Bronze Guides
• 2.045" Intake / 1.600" Stainless Valves  
• Factory Rocker Friendly!!*
• Extra Thick Deck Surfaces For Power Adders
  

 

The all new 220cc cylinder head is finally available for customers looking for a bolt on 15 degree LS cathedral cylinder head.  Think of this cylinder head as the ultimate 15 degree LS1/LS2 cylinder heads for guys wanting a stronger replacement to the LS1 / LS6 / LS2 factory casting.  The perfect head for guys wanting a aftermarket casting  that will retain the use of all there existing components.
Flow Data:

4.00" Flow Plate - No Exhaust Pipe

 

LIFT	INTAKE FLOW	EXHAUST FLOW
.100"	67 CFM	55   CFM
.200"	145 CFM	113 CFM
.300"	207 CFM	166 CFM
.400"	252 CFM	200 CFM
.500"	292 CFM	215 CFM
.600"	304 CFM	226 CFM
.650"	311 CFM	228 CFM

Stock rocker arms will cause increased guide wear in applications over .600" lift.  Roller rockers can help to reduce this wear.