Product • Support • Tuning
Part # 300-121BK
$956.95
Holley EFI 2x4 Dual Plane Intake Manifold, LS Gen 3 LS1/LS2/LS6 engines
Features & Benefits
The Holley GM LS1/LS2/LS6 2x4V dual-plane was designed in the tradition of the great dual Holley 4160 induction systems that competed on drag strips, in Trans-Am and at Lemans in the 1960’s.
Fits: Holley EFI 2x4 Dual Plane Intake Manifold, LS Gen 3 LS1/LS2/LS6 engines, w/Black Ceramic Coating
Installation note: All GM LS Gen 3 engines equipped with LS1/LS2 style cathedral port cylinder heads._x000D_ _x000D_ NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the Hi-Ram EFI intake manifold fuel rail assembly. There is a kit available separately for the LS7 Hi-Ram EFI to allow the use of stock LS7 fuel injectors, P/N 300-230 (see below in the service parts section).
In the box: Fuel Rail(s), Gasket Or Seal
| Basic Operating RPM Range | 1500-6500 RPM |
| CNC Ported | No |
| Carburetor Flange | Square/4150 |
| Carburetor Quantity | 2 |
| Color | Black |
| Construction | Cast |
| Cylinder Head Port Shape | Cathedral |
| Deck Height | 9.24 IN |
| EGR Port | No |
| Engine | GM LS1/LS2/LS6 |
| Flange Style | 4150 Square Bore |
| Front Maximum Height | 4.47 IN |
| Fuel System Type | EFI |
| Manifold Type | Dual Plane |
| Material | Aluminum |
| Plenum Finish | Black |
| Rear Maximum Height | 5.54 IN |
| Removable Runners | No |
| Removable Top/Lid | No |
| Single Or Dual Plane Type | Dual Plane |
| Throttle Body Bore Diameter | 1.75 IN |
| Vacuum Ports | Yes |
The EFI Brain
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