HOLLEY DUAL PLANE
The Holley dual-plane intake offered identical peak power numbers as the Edelbrock but edged out the Performer RPM in torque production.
Like the Edelbrock, the dual-plane Holley offered exceptional low-speed torque, but lacked the top-end charge of the single planes. Run on a smaller LS3-headed combination, the dual-plane Holley would be excellent for a street car or truck. Equipped with the Holley dual plane, the 415 LS3 stroker produced 615 hp and 551 lb-ft of torque. Measured at 4,000 rpm, the Holley topped all of the intakes tested by producing 536 lb-ft of torque.