LS 243 Cathedral Port Cylinder heads

Author: Total Performance   Date Posted:16 June 2023 

LS 243 Cathedral Port Cylinder heads main image LS 243 Cathedral Port Cylinder heads image

TOTAL TORQUE: LS 243 Cathedral Port Cylinder Heads: Unveiling the Powerhouse

Welcome to our “How to” blog post called “Total Torque”.

Tags: are 243 heads cathedral port, are 243 heads good, what are 243 heads, 241 vs 243 heads, 241 vs 243 heads dyno, 243 heads on ls1 gains


If you're in search of the best cylinder heads for your LS engine, look no further than the LS 243 Cathedral Port cylinder heads. These heads have gained a reputation for delivering exceptional performance and power gains. In this post, we will explore the features and advantages of the LS 243 heads, answering common questions and highlighting their benefits over other options like the 241 heads. Let's dive into the world of LS 243 Cathedral Port cylinder heads and discover why they are a go-to choice for LS enthusiasts.

Section 1: Are 243 Heads Cathedral Port?

Yes, the LS 243 heads are indeed cathedral port cylinder heads. The term "cathedral port" refers to the shape of the intake port, resembling the windows of a cathedral. This design offers excellent airflow characteristics, making the LS 243 heads an ideal choice for enthusiasts seeking enhanced performance.

Section 2: Why are 243 Heads Good for LS Engines?

The LS 243 heads have gained recognition for their excellent performance capabilities. With their cathedral port design, they provide improved airflow and promote efficient combustion, resulting in increased horsepower and torque. These heads feature larger valves and efficient chamber designs, allowing for better airflow and enhanced overall engine performance.

Section 3: Understanding the Difference of 243 Heads

The LS 243 heads are an upgrade over the earlier LS 241 heads. While the 241 heads are also cathedral port heads, the 243 heads offer several improvements. The 243 heads have larger combustion chambers, bigger valves, and improved port designs, allowing for increased airflow and improved performance potential.

Section 4: 241 vs. 243 Heads: Dyno Showdown

When comparing the performance of 241 and 243 heads on a dyno, the advantages of the 243 heads become apparent. Due to their larger valves, improved port design, and superior airflow characteristics, the 243 heads tend to provide greater horsepower and torque gains over the 241 heads. Upgrading to 243 heads can result in significant performance enhancements for your LS1 engine.

Section 5: Unleashing the Gains: 243 Heads on LS1

When installed on an LS1 engine, the LS 243 heads can deliver impressive gains in performance. With their enhanced airflow and combustion efficiency, these heads can unlock the true potential of your LS1. Improved throttle response, increased horsepower, and torque are some of the notable benefits of upgrading to the LS 243 heads.


Upgrade your LS engine with the LS 243 Cathedral Port cylinder heads and experience the power and performance gains firsthand. With their cathedral port design, larger valves, and improved airflow characteristics, the LS 243 heads offer unmatched performance for LS enthusiasts. Say goodbye to limitations and unleash the full potential of your LS engine with the LS 243 heads. Upgrade today and witness the difference in power and performance.

Leave a comment

Comments have to be approved before showing up