You are bidding on a Brand New Holley Plenum Top, Black Finish, Compatible with Lo-Ram 600-621 GM LS Gen III & IV engines (Part #300-604).

The 300-604 is the plenum top in the 300-621 complete kit. Offering this separately allows you to select your components individually as you build your system.

Features: 

  • Individual plenum top for 300-621 allows you to select your components individually as you build your intake system
  • Designed for GM LS Gen III & IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads
  • Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application
  • Modular design allowing the use of the included front-feed plenum entry
  • Intake design facilitates custom inlet duct & throttle body placement
  • Low height to fit under a stock or mildly modified hood in the front-feed configuration
  • Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations
  • Clears 1998-2002 (4th Gen) Camaro/Firebird & 1997-2004 (C5) Corvette cowls and hoods without modification
  • High volume fuel rails & mounting hardware included with 3/4"-16 o-ring ports (8 AN)

Specs: 

  • Brand: Holley ЕFI
  • Color: Black
  • Engine: GM LS1/LS2/LS6
  • Finish: Cast
  • Fuel System Type: ЕFI
  • Manifold Type: Lo-Ram
  • Product Type: Plenum Top

We also have thousands of other High Performance Parts in our store.

Shipping:

There is no faster shipping on Ebay.  If you pay for the item by 5:00 Eastern, Monday-Friday, we will ship it the same day.  If it's after 5:00 EST, we will ship it the next business day.  If you pay for the item on the weekend, we will ship it out Monday.

Ebay now requires that sellers put a "handling time" on each item and "1 Business Day" is the shortest listed option.  WE DON'T HAVE A HANDLING TIME.  We ship same day in accordance with the paragraph above.  No delays here.  We want you to have the parts as bad as you do. 

Shipping cost will be $19.99 within the continental United States.  If you buy 2 or more of our auctions, shipping will certainly be combined to save you money.  We will be glad to ship internationally.  Just send me a message for an international shipping quote.

Accepted payment methods:

We accept Paypal. If buyer doesn’t have a Paypal account, he or she can pay with Visa, Mastercard, or Discover through seller’s merchant account.