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Chevrolet Performance Vortec Cylinder Heads 12558060

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

Estimated Ship Date: Monday 12/29/2014 Would you rather pick it up? Select Location

  • Order this item and get free delivery and handling on your entire order! Oversize fees also waived on this item. Valid on orders shipped in the contiguous United States.

Brand: Chevrolet Performance

Manufacturer's Part Number: 12558060

Part Type: Cylinder Heads

Product Line: Chevrolet Performance Vortec Cylinder Heads

Summit Racing Part Number: NAL-12558060

Cylinder Head Style: Assembled

Cylinder Head Material: Cast iron

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 64

CNC-Machined Combustion Chamber: No

Intake Runner Volume (cc): 170cc

CNC-Machined Intake Runner: No

CNC-Machined Exhaust Runner: No

Intake Port Location: Standard

Exhaust Port Shape: Square

Exhaust Port Location: Standard

Spark Plug Style: Straight

Intake Valves Included: Yes

Intake Valve Diameter (in): 1.940 in.

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.500 in.

Valve Springs Included: Yes

Outside Diameter of Outer Spring (in): 1.250 in.

Damper Spring Included: No

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: Umbrella

Rocker Arm Studs Included: Yes

Rocker Arm Nut Thread Size: 3/8-24 in.

Rocker Arms Included: No

Rocker Arm Nuts Included: No

Guideplates Included: No

Accessory Bolt Holes Drilled: Yes

Valve Guides Included: Yes

Valve Guide Material: Bronze

Valve Seats Machined: Yes

Valve Seat Material: Steel

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Quantity: Sold individually.

Notes: Requires Vortec-style intake manifold for installation.

In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

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These 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 64cc fast burn combustion chambers, 170cc intake runners, and a high-velocity LT1 port design. They require the use of a Vortec-style intake and self-aligning rocker arms, and come complete with 1.94 in. intake/1.50 in. exhaust valves, springs, and retainers.

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1 Customer Reviews for Chevrolet Performance 12558060 - Chevrolet Performance Vortec Cylinder Heads

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Good heads for price

Not much lift, so I put these and summit cam 1785 on my 327. Will get at least 40 more ponies with that combo, are made in Mexico like all gm products now.

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Reviewer: CHRISTOPHE from TX

Date: November 27, 2014

Appearance
Ease of Installation
Price/Value
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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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