GM High Ram Plenum Lids

Custom Aluminum Metal-Printed Holley High Ram Plenum Lids

Single or Dual Throttle Body • Custom TB Angles • Custom Logos • Ultra Low / Mid / Tall Options

Bring your Holley High Ram to the next level with a fully custom, 100% aluminum metal-printed plenum lid engineered for strength, airflow, and unlimited personalization. These aren’t plastic lids — these are full-metal, motorsport-grade components built for serious power.

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Key Features

100% Aluminum Metal Printing

Full DMLS (Direct Metal Laser Sintered) construction

High-temperature, high-boost safe

Extremely rigid and lightweight

Zero warping, zero swelling, zero compromises

This is the closest you can get to billet… without the billet price.

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Single or Dual Throttle Body Options

Compatible with all major throttle body patterns:

80mm / 90mm Coyote

GT350 87mm / 90mm

CobraJet Monoblade

GM 90 / 102 / 103 / 105mm

Nick Williams 112mm
…and more.

Custom throttle-body angle options available for hood clearance, charge-pipe routing, or special turbo/supercharger layouts.

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Optional Burst Panel Port

For extreme boost setups needing additional protection.

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Custom Logos & Styling

Perfect for shops, race teams, or one-off personal builds:

Engraved custom logos

Signature patterns

Text or branding
(Wholesale accounts receive custom logo work at no extra charge.)

 

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Height Options

Choose the plenum profile that fits your build:

Ultra Low – Max hood clearance

Mid Height – Ideal balance of power and space

Tall – Maximum plenum volume + top-end horsepower

 

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Why G1Pro Plenum Lids?

True motorsport-grade aluminum construction

Better airflow distribution

Boost-safe structure with internal ribbing

OEM-grade sealing surfaces

Built-to-order for your setup

Designed, tested, and optimized in-house

 

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Lead Time

14–18 days depending on customization level.

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Upgrade your High Ram with a lid engineered specifically around your build, your throttle body, and your airflow goals.

Add to Cart or DM for custom builds.