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Chevrolet Performance

Chevrolet Performance LS7 Cylinder Heads 12578450 GM Bare CNC Ported Head

SKU: NAL12578450

Cylinder Heads
Chevrolet Performance LS7 Cylinder Heads 12578450 GM Bare CNC Ported Head

Chevrolet Performance

Chevrolet Performance LS7 Cylinder Heads 12578450 GM Bare CNC Ported Head

SKU: NAL12578450

Cylinder Heads
A$3,173.54
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Great cylinder head airflow has been a key enabler of the LS-Series' exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads. From the LS6 heads for smaller-displacement engines, to LS7 style heads for 427 in. and-larger combinations, these bare cast aluminum heads benefit from extensive research and development—ensuring maximum airflow without compromises. In fact, many professional builders use these heads as straight bolt-ons with no further machining. The engine cylinder heads are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These replacements are the true OE parts installed during the production of or validated by GM for select vehicles.

LS7 CNC-ported cylinder head assembly notes:

* 356-T6 aluminum head
* Fully CNC'd ports and chambers
* LS7 rectangle port design
* Minimum 4.100 in. bore
* 270cc CNC'd intake ports, 85cc CNC'd exhaust ports
* 70cc CNC'd combustion chambers
* Capable of over 600 hp

Aluminum LS family head technical notes:

* Manufactured from 319-T5 aluminum alloy
* High-efficiency combustion chambers
* Symmetrical intake and exhaust ports
* Angled spark plugs (14mm; 5/8 in. hex; 3/4 in. reach; taper-seat plugs)
* 15 degree valve angle (except C5R and LS7)
* Bolt-down-type rocker arms (except LSX-DR, LSX-CT)
* Centerbolt valve cover hold-downs
* Fits Gen III and Gen IV small blocks only

NOTE: Chevrolet Performance heads will not fit 4.8L and 5.3L engines, due to their smaller bore sizes.

Part Type

CNC Cylinder Head LS7 Bare

Data: v4.2 - Upd: 2026-09-27 15:47:23

Specifications

Product Attributes - Brand
Chevrolet Performance
Product Attributes - Manufacturer's Part Number
12578450
Product Attributes - Part Type
Cylinder Heads
Product Attributes - Product Line
Chevrolet Performance LS7 Cylinder Heads
Product Attributes - UPC
00195491257917
Product Attributes - Combustion Chamber Volume (cc)
70
Product Attributes - Intake Runner Volume (cc)
270cc
Product Attributes - Exhaust Runner Volume (cc)
70cc
Product Attributes - Cylinder Head Style
Bare
Product Attributes - Cylinder Head Material
Cast aluminum
Product Attributes - Intake Port Shape
Rectangular
Product Attributes - Intake Valve Diameter (in.)
2.200 in.
Product Attributes - CNC-Machined Combustion Chamber
Yes
Product Attributes - CNC-Machined Intake Runner
Yes
Product Attributes - CNC-Machined Exhaust Runner
Yes
Product Attributes - Exhaust Port Shape
D-port
Product Attributes - Spark Plug Style
Angle
Product Attributes - Intake Valves Included
No
Product Attributes - Exhaust Valves Included
No
Product Attributes - Exhaust Valve Diameter (in.)
1.610 in.
Product Attributes - Valve Springs Included
No
Product Attributes - Damper Spring Included
No
Product Attributes - Retainers Included
No
Product Attributes - Locks Included
No
Product Attributes - Valve Stem Seals Included
No
Product Attributes - Rocker Arm Studs Included
No
Product Attributes - Rocker Arms Included
No
Product Attributes - Rocker Arm Nuts Included
No
Product Attributes - Guideplates Included
No
Product Attributes - Accessory Bolt Holes Drilled
No
Product Attributes - Valve Guides Included
No
Product Attributes - Valve Seats Machined
No
Product Attributes - Cylinder Head Color
Natural
Product Attributes - Steam Holes Drilled
No
Product Attributes - Machined for O-Ring
No
Product Attributes - Heat Crossover
No
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Chevrolet Performance
StreetFX SKU nal12578450
SFX Item ID 5065486
Supplier Item Code 5065486
Manufacturer SKU 12578450
Manufacturer UPC N/A
Alternative References GMP12578450, LS7

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