Description
Holley LS EFI 2×4 Dual Plane Intake Manifold – Black Ceramic Finish
Classic dual-quad styling meets modern electronic fuel injection performance for GM Gen III LS1, LS2, and LS6 cathedral-port engines.
Product Overview
The Holley 300-121BK 2×4 Dual Plane EFI Intake Manifold delivers iconic dual-quad muscle car aesthetics paired with precision fuel-injected engineering. Designed specifically for GM Gen III LS engines equipped with cathedral port cylinder heads, this intake manifold features an equal-distribution dual-plane runner design. It produces strong mid-range torque without sacrificing top-end horsepower across a wide 1,500 to 7,000 RPM operating band. Cast from durable aluminum with a heat-dissipating black ceramic finish, it accepts dual 4160-style inline throttle bodies for ultimate street and track performance.
Key Features
- ☑ Equal-distribution dual-plane layout optimizes mid-range torque and throttle response
- ☑ Precision fitment for GM Gen III LS1, LS2, and LS6 cathedral port engines
- ☑ Broad 1,500 to 7,000 RPM power band ideal for high-performance street rods and race builds
- ☑ Dual 4160 flange spacing at 8-5/8″ center-to-center for inline throttle bodies
- ☑ Durable cast aluminum construction with sleek black ceramic coating
- ☑ Multi-port EFI fuel rail provision for seamless electronic fuel injection integration
Technical Specifications
| Brand | Holley |
|---|---|
| Manufacturer Part Number | 300-121BK |
| Engine Compatibility | GM Gen III LS1 / LS2 / LS6 |
| Cylinder Head Style | Cathedral Port |
| Manifold Design | Dual Plane 2×4 Mid-Rise |
| Fuel System Type | Multi-Port EFI |
| Flange Spacing | 8-5/8″ (8.625″) Center-to-Center |
| Front Height | 4.47″ |
| Rear Height | 5.54″ |
| Power Band Range | 1,500 – 7,000 RPM |
| Material & Finish | Cast Aluminum / Black Ceramic Coated |
What’s Included in the Box
- 1 x Holley 2×4 Dual Plane EFI Intake Manifold (Black Ceramic)
- 1 x High-Flow EFI Fuel Rail Kit with Mounting Brackets
- Port Gaskets and Hardware Installation Pack
Engineered to uncompromising standards by Holley, this dual-quad intake manifold is available with dedicated technical support and fast UK shipping directly from JP Racing, your premier supplier for UK motorsport and performance engine components.
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