Offenhauser Sales Corp - Offenhauser Turbo Thrust intake manifolds are tall, 2-piece, Tunnel Ram style intakes that make big power. They're available for popular US V8s, both big blocks and small blocks.
BBC Chevy Offenhauser 1x4 Tunnel Ram Intake Manifold + Carter AFB 750 Carburetor | eBay
Offenhauser 360 Mopar Tunnel Ram And Street Scoop for Sale in Galt, CA - OfferUp