Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
![Plenum Top for 300-621 Modular Ultra Lo-Ram Intake Bases [Satin Finish]](https://www.jegs.com/images/mini_750/500/510/510-300-604.jpg)
Product Discontinued
HOLLEYPART NUMBER: 510-300-604
Plenum Top for 300-621 Modular Ultra Lo-Ram Intake Bases [Satin Finish]
Currently Unavailable
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
Intake Manifold Tops [Lids]
Modular Ultra Lo-Ram EFI Intake Manifold Plenum TopFor Holley 300-621 GM LS1/LS2/LS6 Cast Aluminum Satin Finish
Holley 300-604 Features:
- Plenum top for Holley Modular Ultra Lo-Ram EFI Intake Manifold 300-621
- Designed for GM LS Gen III and IV engines equipped with GM LS1/LS2/LS6 cathedral port cylinder heads
- Bolt-through design
- Non-burst panel
- Cast aluminum construction with a satin finish
Note: Plenum top casting can be machined for a 6 1/8 in. x 3 1/8 in. burst panel
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeIntake Manifold Cover
BrandHOLLEY
Package Height1.97
Package Width10.23
Package Length18.7
Weight4.45 PG
Part CategoryPerformance Parts
Cover FinishSatin
Cover Plate MaterialAluminum
QuantitySold individually
Mounting Hardware IncludedYes
Package Qty1
Package TypeEA
No Questions
No Reviews
REPLACEMENT PARTS
Some parts are not legal for use in California or other states with similar laws / regulations
