Most heads are swappable but some will reduce power. Some won't fit as some heads are designed for a wide bore. But don't worry, most LS heads are so good they don’t need to be swapped.

LS cylinder heads have also changed and mostly improved over the 20+ year history of the LS engine. Let’s dive into the details and see if we can discover the best heads for your build.

Small Valve Head Test Article:
https://www.motortrend.com/how-to/171...

Chapters
0:00 - Intro
1:03 - Port Types
2:12 - Type #1: LS1 Head
2:47 - Type #2: LS2 / LS6 Head
3:32 - Type #3: Iron Head
4:27 - Type #4: Small Valve Head
5:47 - Type #5: LQ4/LQ9 Head
7:08 - Type #6: LS7 Head
7:53 - Type #7: L92/LS3 Head
9:03 - Type #8: Supercharged Head
9:37 - Valve Sizes
10:13 - Chamber & Port Volume
10:27 - Summary
11:03 - Recommendations (4 best types)

Auto Guild...Dedicated to enthusiasts of impractical cars of all types, but especially Sports Cars and Muscle Cars.

From gear head engine swaps and power mods, to driving tips and road trip ideas. The love of all things cars, especially the fun impractical ones we love.

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An association of people with similar interests, often providing mutual aid towards the pursuit of a common goal.