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Holley EFI Ultra Lo-Ram Manifold Base (Black Finish) GM Gen V LT Engine

$582.95 Sale:$517.95

Holley EFI

Model #300-712BK


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The Holley GM Gen V LT Ultra Lo-Ram intake manifold kits are designed for GM Gen V LT engines equipped with GM LT cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Ultra Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7,000-8,000 rpm depending on the application.

The front entry throttle body flange has a 105mm opening to work with throttle body part number 112-581 or similar models. The front-feed base intake manifold is designed with a lower overall height to fit under a stock or mildly modified hood. The Ultra Lo-Ram provides a very low-profile modular intake manifold along with various fabrication flanges to aid the fabrication of special throttle body adapters or inlet ducts for custom installations. Available for OE direct fuel injection only and with port fuel injection provisions and a burst panel flange options.

For the port fuel injection option, the high volume -8AN fuel rail kit includes hardware and brackets to accommodate long (usually standard length) fuel injectors or short (such as Pico, or LS7) fuel injectors.

Product Features:

  • Designed for GM Gen V engines equipped with GM LT type cylinder heads
  • 105mm diameter throttle body opening accepts OEM 4-bolt LS/LT DBW or Holley LS/LT throttle bodies
  • Engineered for forced induction (supercharged or turbocharged) engine applications with peak power at 7,000-8,000 rpm depending on the application
  • Only 0.97-inch taller than a factory LT1 manifold provides maximum clearance under a stock or mildly modified hood
  • Modular design & front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations. Base manifold, plenum top, throttle body adapter available as separate kits
  • Clears C7 Corvette cowls and hoods without modification
  • Available for OE direct fuel injection only or with added port fuel injection provisions
  • Kits with port injection provide high volume fuel rails with 3/4-16 O-ring ports (8 AN). Mounting hardware is included
  • Ultra Lo-Ram kits with a burst panel flange are available, Ultra Lo-Ram billet burst panel duct is offered separately (PN: 300-608 clear anodized, PN: 300-608BK black anodized)
  • Black Powder Coat Finish
Product Specifications:
  • Brand: Holley EFI
  • Emission Code: 3
  • Engine: GM Gen V LT1
  • Finish: Black
  • Flange Style: EFI
  • Product Type: Intake Manifold
  • RPM Power Band: 3500-8000
  • Warranty: Limited 90 Day
Product Installation:Product Fitment:
  • GM Gen V LT Engine

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Who is Holley EFI?

Holley EFI is a division of Holley that is one of the best aftermarket brands in the automotive industry. Holley EFI  is a company known for producing high-performance parts specifically electronic fuel injection system parts. The company’s history can be traced back to the late 1800s when brothers George and Earl Holley learned how to make pattern casting that enabled them to build one-cylinder engines. Then in 1903, they provided Henry Ford with the carburetor and became the industry leader in fuel system technology. The rest is, as they say, history.

Fuel System Experts

For over a century, Holley EFI has always been at the forefront of designing parts for the fuel delivery system. From electronic fuel injections kits and fuel system accessories, Holley  EFI has it all. Today, Holley EFI is considered one of the top aftermarket brands in the world.

Being Part Of History

Not everyone is aware that Holley provided fuel systems components for the military during WWII, and it is not for automobiles but planes and boats. Since then, the company has become a dominant force when it comes to fuel delivery system components and has been used by many champion racers and enthusiasts. 

Choice Of Champions

Since the 1960s, Holley has powered every NASCAR sprint cup car and every winning NHRA Pro Stock Team even today. It is a testament to the kind of products the company produces.

Purchase Holley Products At Vivid Racing

If you are in the market for high-quality fuel delivery system components for your vehicle, then choose the best brand out there, and that is Holley EFI. Not every company can boast 100 years of experience. 

To know more about Holley EFI, visit Vivid Racing and check out their list of products that fit your specific requirement.

90 Day Limited Warranty applies to B&M transmissions, launch control kits and all electrical components (switches, lights, solenoids).

Holley Performance Products warrants its Holley Street Avenger™ Carburetor to be free from defects in material and workmanship for the life of the product on parts and one year on repair labor. After a period of one year, Holley will charge standard rates for repair labor. For any Holley Street Avenger Carburetor used in any type racing or off-road use will only be covered by a one (1) year limited warranty on parts and labor. Warranty performance will be initiated by returning the alleged defective product to HOLLEY PERFORMANCE PRODUCTS with the original, dated purchase receipt. Purchaser is to call toll free the Holley Factory Service number at 1-866-464-6553 to receive details and shipping instructions.



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