FAST LSX HR intake manifold Dyno testing! Runner length comparisons! Lsxhr ls3 Silverado 408 ls

We tested the different runner lengths on the same combo back to back to back so you could all see a real world comparisons. When I was searching for a good ls3 based intake for my new 408. I couldn’t find any of this specific data so I decided I’d do it for the next guy!