Holley 300-140 Hi-Ram Intake Manifold - GM LT1

GM Gen V LT1 Hi-Ram, 1 x 105mm LS Throttle Body (Longitudinal Mount) w/Port EFI Provisions & Fuel Rails

Part Number: 300-140

The new Holley EFI Hi-Ram intake provides the ultimate performance with the new GM direct injected Gen V 6.2L LT1 engine. The modular design of this manifold allows easy disassembly for custom porting, multiple tops, or custom induction systems. Each runner has a large radius where it meets the plenum, and optimized taper and cross-sectional area to perform in a wide variety of engine configurations. The optional injector bosses on the intake runners allow increased performance potential by using additional injectors along with the factory direct injection. When you look for the pinnacle of performance, price, and quality, look to Holley EFI.

Features and Benefits

• Height at Plenum Flange: 9.44”
• 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
• Fuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End
• A-B Height: 12.10” (w/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing
• Port Size: 2.06” Height x 1.53” Width
• Several Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies
• Runner Length: Approx. 6.5”
• Available With or Without Injector Ports in the Runners
• Rear of Plenum Machined for MAP and 3 Vacuum Ports
• Increased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner
• Intakes w/ Injector Ports Include Fuel Rails w/ Dual Mounting (1.48” or 2.56” O-Ring to O-Ring injector length)
• Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)
• O-Ring Seals at Cylinder Heads and Plenum Top
• Head Flange has Clearance for Fuel Supply to High Pressure Pump
• Easy Assembly w/ Top Mounted Screws on Plenum Top (all except front 2 screws)
• Overall Height: 13.34” (w/ EFI Top - 95mm or 105mm) – See Drawing
• Modular Design w/ Removable Top
• 3500-8000+ RPM Power Band

*** The front and rear height measurements listed in the Specs section are referencing the overall height with the top plate installed. Please see the diagrams in the product images for other dimensions.