Holley EFI - Holley Single Plane EFI Intake-GM LS1/LS2/LS6 - Black 300-137BK
Type: Intake Manifold | Fits: GM
Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.
Black Ceramic Coating to provide you with that aggressive look in your engine compartment.
Features:
- Black ceramic coating provides an aggressive look to your engine compartment
- 2500-7000 RPM power band
- 4150 Square bore flange
- Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 2500-7000 RPM
- Minimum carb flange height - fit in vehicles with minimum hood modifications
- Cast aluminum construction - great manifold for centrifugal blower, turbocharged or NOS power adder applications
- Efficient casting design - lightweight, consistent wall thicknesses, improved casting quality
- Weight - 11.5 lbs.
- Height (front) - 5.417" to the lifter valley cover flange at the engine block front flange
- Port size - 2.50" height x 1.15" wide
- Includes Viton® O-ring intake to cylinder head gaskets - Viton® is a registered trademark of DuPont Performance Elastomers
- Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219
Specs:
- Basic Operating RPM Range: 2500-7000 RPM
- Brand: Holley EFI
- Carburetor Flange: Square/4150
- Category: Engine
- Color: Black
- Construction: Cast
- EGR Port: No
- Emission Code: 4
- Engine: GM LS1/LS2/LS6
- Finish: Black
- Front Height: 5.417 inch
- Front Maximum Height: 5.417 IN
- Fuel Injectors Included: No
- Fuel Rail(s) Included: No
- Fuel System Type: EFI
- Gasket Or Seal Included: Yes
- Grade Type: Performance
- Intake Port Gasket(s) Included: No
- Manifold Type: Single Plane
- Material: Aluminum
- Nitrous Bung(s) Included: No
- Part Type: Engine Intake Manifold
- Plenum Finish: Black
- Product Type: Intake Manifold
- Rear Height: 5.417 inch
- Rear Maximum Height: 5.417 IN
- Recommended Use: Forced Induction
- Removable Runners: No
- RPM Power Band: 2500-7000 RPM
- Single Or Dual Plane Type: Single Plane
- Sub Category: Cylinder Block Components
- Throttle Body Included: No
- Warranty: Limited 90 Day
Tech Resources:
Includes mounting bolts & washers. Also includes O-ring cylinder head mounting flange gaskets for an OEM style seal. Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219.
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).
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Important Notices
- Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
