Pontiac GTO 400 Engine Block Build Up - Poncho Honcho
|
"D"-shaped exhaust ports were proven decades ago on GM Tech Center dynos to work best on high-performance engines. Though the heads are based on the round-port R/A-IVs, the exhaust port design was changed in the Edelbrock head to this D-shape. Nevertheless, the round-port manifold or header configuration is required when using these heads. View Related Article
|
|