Click on image to zoom

Holley Performance Holley Hi-Ram Lower Manifold 300-123


Cathedral Port EFI For 1 x 105mm Throttle Body - Hi-Ram Manifold - Front/Rear Height 8.42 in. - RPM Power Band 1500-7000 - Satin Finish

Pricing: $758.95


Holley Performance - Holley Hi-Ram Lower Manifold P/N 300-123 Features:

  • Base Plenum Top Mtg Flange Ht 8.42in. Lifter Valley Cvr Flange
  • Total Height 12.32 in. To The Lifter Valley Cover Flange
  • Runner Length 6.58 in. As-Cast
  • Throttle Body Flange Location w/92/102mm EFI
  • Plenum Top Gasket Type 3/32 in. Round O-Ring Cord
  • Mounting Flange Gasket Type Standard LS3 Molded O-Ring
  • Port Size 2.49in. Height X 1.21 in. Wide
  • Plenum Top: Height 8.42 in.
  • Longitudinal Location3.84in.

Product Documents:


Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro–Stock champion. Holley's products include performance fuel pumps, fuel injection, intake manifolds, cylinder heads & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Hooker Headers, Flowtech Headers, NOS, Weiand, or Earl's, Holley products can give you the edge you need over the competition.


  • 300-123
  • 300-123
  • 090127681688
  • Holley Performance
  • New

Shipping Information

  • Item Requires Shipping
  • 35.0 lbs.
  • W14.7500” x H13.0000” x L24.0000”

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.