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The Modular Mid-Rise intake utilizes the popular Holley LS1/LS2/LS6
cathedral port Mid-Rise 2 x 4 intake manifold along with a purpose built
plenum base adapter and a Holley 105MM EFI plenum top which converts it into
a Mid-Rise EFI intake manifold. With a max overall height of only 10.44â€,
the Mid-Rise manifold is an excellent choice for street and performance
street/strip applications with a powerband from 1,500-6,500 RPM and limited
hood clearance. Itâ€™s perfect for turbocharged, or normally aspirated
This manifold is modular, and the plenum adapter (PN 300-231) will accept
all of the popular Holley LS Hi-Ram plenum tops as a foundation for custom
Recalibration of the ECU may be required when using this
intake manifold design with OE ECU.
Holley EFI LS main harnesses have a map sensor connecter
designed for use with an LS1/2 style map sensor. The 558-416
is an adapter harness that can be used to adapt any LS
harness that uses a LS1/2 MAP sensor connection to a LS3
MAP, which is recommended for this manifold. NOTE: these
manifolds & fuel rails are designed to accept Bosch Style
EV-1 or Magneti Marelli Pico fuel injectors (OE LS fuel
injectors may not fit properly in the intake manifold & fuel
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