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Chevrolet Performance Vortec Cylinder Heads 12691728

Name: Buy Chevrolet Performance Vortec Cylinder Heads 12691728 online - Cars Auto Parts LLC
SKU: 12691728
Price: 553.39 USD
Availability: InStock

Original price was: $691.74.Current price is: $553.39.

Cylinder Head, Vortec, Assembled, Cast Iron, 64cc Chamber, 170cc Intake Runner, Chevy, Small Block, Each

SKU: 12691728 Categories: Cylinder Heads, Engines & Components Tags: Cylinder Heads, Engines & Components

Description
Additional information

Brand:

Chevrolet Performance

Manufacturer’s Part Number:

12691728

Part Type:

Cylinder Heads

Product Line:

Chevrolet Performance Vortec Cylinder Heads

Summit Racing Part Number:

NAL-12691728

Combustion Chamber Volume (cc):

Intake Runner Volume (cc):

170cc

Cylinder Head Style:

Assembled

Cylinder Head Material:

Cast iron

Intake Port Shape:

Rectangular

Intake Valve Diameter (in.):

1.940 in.

CNC-Machined Combustion Chamber:

CNC-Machined Intake Runner:

CNC-Machined Exhaust Runner:

Intake Port Location:

Standard

Exhaust Port Shape:

Rectangular

Exhaust Port Location:

Standard

Spark Plug Style:

Straight

Intake Valves Included:

Yes

Exhaust Valves Included:

Yes

Exhaust Valve Diameter (in.):

1.500 in.

Valve Springs Included:

Yes

Maximum Valve Lift (in.):

0.475 in.

Camshaft Style:

Hydraulic flat tappet

Outside Diameter of Outer Spring (in.):

1.250 in.

Damper Spring Included:

Yes

Number of Springs Per Valve:

Single

Retainers Included:

Yes

Retainer Material:

Steel

Locks Included:

Yes

Lock Style:

7 degree

Valve Stem Seals Included:

Yes

Valve Stem Seal Style:

Positive stop

Rocker Arm Studs Included:

Yes

Rocker Arm Nut Thread Size:

3/8 in.-24

Rocker Arms Included:

Rocker Arm Nuts Included:

Guideplates Included:

Valve Cover Mounting Style:

Centerbolt

Accessory Bolt Holes Drilled:

Yes

Valve Guides Included:

Yes

Valve Guide Material:

Manganese bronze

Valve Seats Machined:

Yes

Cylinder Head Color:

Natural

Steam Holes Drilled:

Oiling Style:

Through pushrod

Machined for O-Ring:

Heat Crossover:

Remanufactured:

Quantity:

Sold individually.

Notes:

Max Valve Lift as delivered is 0.475 in. and anything above requires machining of the valve guide bosses and checking valve seal-to-valve spring retainer clearance. The installed valve springs have approximately 80 lbs. seat pressure and 195 lbs. open at 0.450 in. lift and are compatible with the stock hydraulic roller camshaft and most hydraulic flat tappet camshafts.

Chevrolet Performance cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 hp increase over earlier cast iron small block heads. Features include fast burn combustion chambers, and a high-velocity port design. They require the use of a Vortec-style intake and self-aligning rocker arms, and come complete with valves, springs, and retainers.

Brand	Chevrolet Performance
MPN	12691728

Chevrolet Performance Vortec Cylinder Heads 12691728

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