These 5.0L EFI intake manifolds from Holley may be emissions-legal, but don't let that fool you into thinking they're restrictive--they flow tons of unrestricted air! They feature a 2,000 to 6,500 rpm power band, external EGR-passage maximized port and runner sizes, and they retain the stock injector and water outlet locations. The lower manifold ports match up to Holley cylinder heads, so you can be assured of getting the perfect match in the perfect power setup.
These intake manifolds feature port-matched upper and lower runners for reduced restrictions. Plus, the EGR passages have been relocated to the outside of the manifold, to allow the use of larger intake ports. The result is greater air capacity, which makes these manifolds the perfect choice for supercharged engines.
In head-to-head dyno testing, Holley Keith Dorton Signature series intake manifolds outperformed the nearest competition by 25 HP at 7,100 rpm. Engineered by Holley and professional engine builder Keith Dorton, their single plane design yields superior power in the 4,500 rpm to 8,500 rpm range. They fit 23 degree, standard-port Chevy small block heads, have a square bore mounting flange, and are ideal for classes requiring cast iron heads and un-ported manifolds. They're designed for Oval Track and drag racing.
Based off the LS6 manifold, Holley's new aluminum manifold makes more power on the LS1 by increasing air flow and giving the engine builder the ability to port match to the cylinder heads increasing the flow through the entire engine, not just through the manifold. Lingenfelter & Holley designed this manifold with a removable bottom plate to give access to internal passages. This design feature makes porting and installing a direct port nitrous system a breeze. The aluminum manifold is a street rod builders dream with the ability to be polished to a show finish. This Holley manifold is perfect for blown, stroker and nitrous applications or for anyone looking to increase the power output of their LS1.
These Holley Pro Dominator intake manifolds are designed to fit standard deck blocks and feature a power band of 4,500-8,000 rpm. They are made of aluminum and have a natural finish. The intake manifolds require the use of a top plate, sold separately, to mount on your carburetors. The top plates are available in single or dual 4-barrel sizes, and for Holley Dominator or standard 4150-style carburetors.
These intakes were designed for Holley 2-barrel Pro-Jection systems. They're high-rise, dual-plane manifolds with an EGR provision, and their powerband ranges from idle to 6,000 rpm. With these manifolds, there is no need for manifold-to-TBI adapters. They come with an EGR valve mounting pad, an EGR valve gasket, coil, and A/C bracket mounting bosses, and a transmission and throttle cable bracket.
Dual plane Holley Street Dominator intake manifolds are designed to exceed the performance of most OEM 4-barrel intake manifolds. With their low-rise or medium-rise configuration, divided plenum, and dual plane runner layout, they provide excellent low and mid-range power output--from idle up to as high as 5,200 rpm. They can take several carb types and sizes, and will enable you to maximize street performance.
Holley Strip Dominator intake manifolds are classics that have been making power for Chevys for almost as long as Holley has been making carburetors. They're proven power builders, engineered to achieve maximum performance. Their single plane design, with a deep, open plenum and isolated runners, produces good power from 4,500 rpm to 7,600 rpm for small blocks, and up to 8,500 rpm on big blocks. There is no exhaust heat crossover.
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