Engines and Components› Cylinder Heads and Components

Chevrolet Performance

LS Series Cathedral Port Cylinder Head

$169.74

SKU: 12564243

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$100 Minimum Order
30 Days Return
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Overview

It features a cathedral intake port design for enhanced combustion efficiency. This cylinder head is cross-referenced across multiple GM LS series applications and is noted for its durability and precise engineering.
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Its cathedral intake port design contributes to enhanced combustion efficiency, making it a suitable component for trucks, vans, SUVs, and performance vehicles. This cylinder head, with casting number 243, is known for its durability and precise engineering, making it a desirable upgrade for both motorsport and everyday driving conditions. This cylinder head is identified by GM part number 12564243 and casting number 243, and is compatible with various LS series engines including LS2 and LS6. It features a combustion chamber volume of 64.45cc. The head is described as a USED/REBUILDABLE CORE and has been industrially cleaned and inspected for cracks and damage before shipping. It is important for buyers to research and ensure the fitment of this part to their specific vehicle before purchasing, as returns due to non-fitment are subject to a restocking fee, and the customer is responsible for return shipping.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandChevrolet Performance
Part Number12564243
CategoryEngines and Components
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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