Cathedral Port Blog
Holley Releases Single-Plane Split-Design Race Intake Manifold| 03/27/2019
They're lighter than ordinary split race intakes and cost one-third to one-half as much.
Sniper EFI Releases Dual Plenum Intake Manifolds For LS Engines| 11/05/2018
They're available for both cathedral-port and rectangular-port heads, and both versions increase airflow and improve dispersion to the intake ports.
Holley Releases Single Plane Split-Design Race Intake Manifolds| 10/22/2018
They're made just for high-performance and race Gen III LS engines with cathedral port heads and 4150-style square-bore flanged carburetors or throttle bodies.