Part Number:

CNC-LS243-660HR

LS 243 CNC Ported Aluminum Cylinder Heads Assembled .660 Lift (2 Heads)

CNC Ported LS1/6 243 Cylinder Heads, Stainless 2.000 Intake Valve, 1.600 Exhaust valves, Locks, Retainers, .660 Lift Hydraulic Roller, 2 Heads, Fully Machined and Assembled

$1,949.95

Head Upgrades

Soften Chambers + $300.00

Customer Supplies Castings - $200.00

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⚠ PROP 65 WARNING

⚠ WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer. Please contact us to obtain a list of harmful chemicals. For more information, go to www.P65Warnings.ca.gov.

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Description

Ported LS1/6 243 aluminum cylinder heads (2 heads ). Bolt on 50-75+ horsepower over stock
Included Components:

CNC Ported Intake ports

CNC Ported Exhaust ports

CNC Ported combustion chambers

Multi-angle performance valve job

Resurfaced deck surface for MLS gaskets

Assembled and blue-printed to performance specs

CNC 2.000 Stainless 1pc 8mm Intake valves

CNC 1.600 Stainless 1pc 8mm exhaust valves

CNC steel valve spring retainers

CNC Valve Locks

CNC .660 lift springs

Seat Pressure: 165 pounds @ 1.780 Installed height

Open Pressure: 385 pounds .550 lift

Open Pressure: 422 pounds .630 Lift

Spring Rate: 408

Coil Bind: 1.060

Max lift: .660

Flow Numbers:

Intake Flow

.100 70 cfm

.200 149 cfm

.300 212 cfm

.400 260 cfm

.500 300 cfm

.600 309 cfm

.700 310 cfm

Exhaust Flow - no pipe

.100 49 cfm

.200 107 cfm

.300 145 cfm

.400 171 cfm

.500 190 cfm

.600 202 cfm

.700 209 cfm

Specifications

More Information
CNC Part Number	CNC-LS243-660HR
Price	$1,949.95
Sold As	Set
Manufacturer's Part Number	LS243-660HR
Brands	CNC-Motorsports
Part Types	Cylinder Head
Departments	Parts
Vehicle Make	Chevy LS
Cylinder Head Material	Aluminum
Cylinder Head Style	Assembled
Exhaust Valve Size	1.600
Intake Valve Size	2.000
Custom Notices	⚠ PROP 65 WARNING