Engines and Components› Cylinder Heads and Components

Airflow Research

LS3 12-Degr Cylinder Heads Fully CNC Ported

$3,286.42

SKU: A03K 1845

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In Stock
Ships by Aug 2
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Description

LS3 12-Degr Cylinder Heads Fully CNC Ported

MIA's Description

The Air Flow Research LS3 12-Degr Cylinder Heads are fully CNC-ported performance cylinder heads designed to maximize LS3 engine output. These assembled heads feature 260cc intake runners and a 69cc combustion chamber, supporting higher RPM and boost applications. Constructed from A356 aluminum, they are compatible with GM LS-Series engines and are sold as a pair.

Fitment

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Specifications

BrandAirflow Research
Part NumberA03K 1845

Videos

AFR (Airflow Research) Cylinder Heads Product Overview at SEMA 2017

AFR (Airflow Research) Cylinder Heads Product Overview at SEMA 2017
CAN YOU BORE 5.3 LS TO 6.0? YES! YOUTUBE'S FIRST LS 5.3 ENGINE WITH 4" BORE AND LS3 AFR #1845 HEADS

CAN YOU BORE 5.3 LS TO 6.0? YES! YOUTUBE'S FIRST LS 5.3 ENGINE WITH 4" BORE AND LS3 AFR #1845 HEADS

Buy with Confidence

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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