Holley 300-680BK Ultra Lo-Ram Manifold Kit Single Injector Black

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US$219.98
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US$219.98
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Free shipping Free 30-day returns

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Management number 254513515 Release Date 2026/11/07 List Price US$219.98 Model Number 254513515
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Compatible with GM LS Gen III and IV engines equipped with LS3/L92 Heads;<br><br>This intake will work with OE or aftermarket LS3/L92 cylinder heads. The Ultra Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application. Plenum top has a machine flange for the use of a 6-1/8" x 3-1/8" burst panel (not included). The Ultra Lo-Ram plenum flange has a 105 mm opening to work with Holley throttle body part number 112-581 or similar models. Very low overall height to fit under stock or mildly modified hoods. Even clears the low C6 Corvette hoodline. Modular design allows fabrication of special throttle body adapters or inlet ducts for custom installations. Includes high flow fuel rails with 3/4-16 O-ring ports (8 AN). Rail kit comes with two sets of brackets, a set for long (usually standard length) fuel injectors and a set for short (such as Pico, or LS7) fuel injectors. Designed for single (1 per cylinder) injector applications. For dual injector applications with burst panel provision, use #300-684BK. Mounting hardware and gaskets are included.;

  • Designed for Gen III/IV engines with OE or aftermarket LS3/L92 heads
  • Maximum performance for supercharged or turbocharged applications with peak power at 7000-8000 rpm
  • Accepts 105mm throttle bodies like Holley 112-581
  • Low height to fit under a stock or mildly modified hood in the front- Clears C6 Corvette cowls and hoods without modification
  • High volume fuel rails with 3/4-16 O-ring ports (8 AN) for single (1 per cylinder) injector configurations. Two sets of brackets allow use of standard tall injectors or short Pico LS7 style injectors. Mounting hardware included.
Vehicle fitment type Specific
Vehicle type Car
Brand Holley EFI
Material Cast Iron
Weight 25.35 lb
Finish Black
Items included Mounting hardware
Has written warranty No

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