Holley Performance 300-122 Engine Intake Manifold
Holley Performance 300-122 Engine Intake Manifold
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Holley Performance 300-122 Engine Intake Manifold

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Key item features

  • Optimal Dimensions: The base plenum top mounting flange height is 8.42 inches, extending to 12.32 inches total height with the 92/102mm EFI plenum top, measured from the lifter valley cover flange.
  • Precise Porting: Features a port size of 2.49 inches in height and 1.21 inches in width, with a runner length of 6.58 inches and a tapered cross-sectional area from 4.25 in² to 2.53 in².
  • Robust Construction: Constructed from cast aluminum, this manifold is designed for LS1/LS2/LS6 Cathedral Port EFI applications, accommodating a single 92MM throttle body.
  • Modular Design: The base is engineered for modularity, allowing it to accept various carbureted and EFI tops, making it suitable for custom induction systems.
  • Fuel System Ready: Includes EFI fuel rails machined for -8AN O-ring fittings, designed with large passages to support high fuel flows and dampen pressure pulsations.
  • Performance Application: Intended for naturally aspirated or forced induction engines ranging from 6.0 to 7.0+ liters, achieving maximum power between 7000-8000+ RPM.
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3 out of 5 stars
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Showing 1-2 of 2 reviews

Oct 17, 2019
Duddy87
4 out of 5 stars review

I recently bought this item and left it in the box until yesterday for installation for my vehicle. And come to realize there was 2 missing intake studs, 2 missing washers and 2 missing nuts. I will get pictures for reassurance for you guys but over great product. But there is no place in my town to get these specific hardware was willing to know if you guys at jegs could send me the material I need to get intake fully bolted down on vehicle. Thank you.

Review from jegs.com
Helpful?2RIS7DLT7KH1103964910
Dec 19, 2022
Adam S
2 out of 5 stars review

Item broke but replaced

Not well packed item was broke and missing parts. Jegs replaced but was in need of it fast took about 4 days extra. Intake was hanging out of bottom of box

Review from jegs.com
Helpful?2RIS7DLT7KH1103964910