Holley EFI Ultra Lo-Ram Intake Manifold Kit 105mm Cathedral Port — Fits GM LS-Series

SKU: GVMR_300-621
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About Holley EFI Holley EFI engineers high-quality automotive parts and ...Read More

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Sale price$943.95
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Unleash Power with the Ultra Lo-Ram for Cathedral Port LS

The Holley EFI Ultra Lo-Ram Intake Manifold Kit is the pinnacle of intake technology for Cathedral Port LS engines. Designed for those who refuse to compromise, this kit includes everything you need to optimize your engine's breathing, including high-flow fuel rails. With a massive 105mm throttle body flange, this manifold is ready to support high-horsepower builds that require maximum air volume.

Key Specifications

  • Designed for Cathedral Port LS cylinder heads
  • Includes high-flow fuel rails for consistent pressure
  • 105mm throttle body flange for maximum airflow
  • Ultra-low profile for maximum hood clearance
  • Multi-port EFI design for superior fuel atomization

The Ultra Lo-Ram is specifically engineered to provide the performance of a race-ready tunnel ram in a package that fits under most factory hoods. Its advanced runner design promotes even air distribution to all cylinders, which is critical for high-RPM stability and power production. The included fuel rails are designed to handle high-pressure fuel systems, ensuring your engine gets the fuel it needs under any load. Whether you are running a naturally aspirated setup or a high-boost turbo configuration, this manifold provides the durability and performance necessary to dominate the track. Built from high-quality aluminum, it is as rugged as it is efficient. Take your build to the next level with the best components on the market. Shop the full Holley EFI collection at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Unleash Power with the Ultra Lo-Ram for Cathedral Port LS

The Holley EFI Ultra Lo-Ram Intake Manifold Kit is the pinnacle of intake technology for Cathedral Port LS engines. Designed for those who refuse to compromise, this kit includes everything you need to optimize your engine's breathing, including high-flow fuel rails. With a massive 105mm throttle body flange, this manifold is ready to support high-horsepower builds that require maximum air volume.

Key Specifications

  • Designed for Cathedral Port LS cylinder heads
  • Includes high-flow fuel rails for consistent pressure
  • 105mm throttle body flange for maximum airflow
  • Ultra-low profile for maximum hood clearance
  • Multi-port EFI design for superior fuel atomization

The Ultra Lo-Ram is specifically engineered to provide the performance of a race-ready tunnel ram in a package that fits under most factory hoods. Its advanced runner design promotes even air distribution to all cylinders, which is critical for high-RPM stability and power production. The included fuel rails are designed to handle high-pressure fuel systems, ensuring your engine gets the fuel it needs under any load. Whether you are running a naturally aspirated setup or a high-boost turbo configuration, this manifold provides the durability and performance necessary to dominate the track. Built from high-quality aluminum, it is as rugged as it is efficient. Take your build to the next level with the best components on the market. Shop the full Holley EFI collection at GGCRACING.

Product Details

Product Description

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Unleash Power with the Ultra Lo-Ram for Cathedral Port LS

The Holley EFI Ultra Lo-Ram Intake Manifold Kit is the pinnacle of intake technology for Cathedral Port LS engines. Designed for those who refuse to compromise, this kit includes everything you need to optimize your engine's breathing, including high-flow fuel rails. With a massive 105mm throttle body flange, this manifold is ready to support high-horsepower builds that require maximum air volume.

Key Specifications

  • Designed for Cathedral Port LS cylinder heads
  • Includes high-flow fuel rails for consistent pressure
  • 105mm throttle body flange for maximum airflow
  • Ultra-low profile for maximum hood clearance
  • Multi-port EFI design for superior fuel atomization

The Ultra Lo-Ram is specifically engineered to provide the performance of a race-ready tunnel ram in a package that fits under most factory hoods. Its advanced runner design promotes even air distribution to all cylinders, which is critical for high-RPM stability and power production. The included fuel rails are designed to handle high-pressure fuel systems, ensuring your engine gets the fuel it needs under any load. Whether you are running a naturally aspirated setup or a high-boost turbo configuration, this manifold provides the durability and performance necessary to dominate the track. Built from high-quality aluminum, it is as rugged as it is efficient. Take your build to the next level with the best components on the market. Shop the full Holley EFI collection at GGCRACING.

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