Features:

• Modular Design w/ Removable Top
• Available With or Without Injector Ports in the Runners
• Fuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End
• Rear of Plenum Machined for MAP and 3 Vacuum Ports
• Head Flange has Clearance for Fuel Supply to High Pressure Pump
• Increased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner
• O-Ring Seals at Cylinder Heads and Plenum Top
• Easy Assembly w/ Top Mounted Screws on Plenum Top (all except front 2 screws)
• Injectors are 40mm Height measured O-Ring to O-Ring utilizing a 14mm O-Ring diameter, not for use in LS2/LS3/LSA applications without the use of a custom lower O-Ring
• Overall Height: 13.34” (w/ EFI Top - 95mm or 105mm) – See Drawing
• A-B Height: 12.10” (w/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing
• Height at Plenum Flange: 9.44”
• Port Size: 2.06” Height x 1.53” Width
• Runner Length: Approx. 6.5”
• Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)
• Intakes w/ Injector Ports Include Fuel Rails w/ Dual Mounting (1.48” or 2.56” O-ring to O-ring injector length)
• Several Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies
• 3500-8000+ RPM Power Band

About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!

• Gasket Kit, Hi-Ram Plenum O-Ring Cord

  Gasket Kit, Hi-Ram Plenum O-Ring Cord

  Part# 508-21

  $34.85

  Qty: 

  Add To Cart

The following vehicles are considered Racing Use Only Vehicles:

• Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle