Holley EFI - Hi-Flow Billet Fuel Rails for Gen III Hemi Engines 534-284
Type: Fuel Rail
The new Hi-Flow billet fuel rails are a direct fit for naturally aspirated Gen III Hemi engines including the 5.7L, 6.1L, and the 6.4L from 2003-2021. The fuel rails feature a 5/8" diameter fuel passage that provides more flow capacity for high horsepower applications over the stock rails.
The black anodized rails have -8 ORB ports on each end and an 1/8" NPT port for a fuel gauge installation if you choose to do so. The rails are designed with the factory injector clip reliefs so that your factory injectors and retaining clips can be reused. The kit includes fuel rails, mounting brackets and required mounting hardware.
Features:
- Direct fit for naturally aspirated Gen III Hemi engines including the 5.7L, 6.1L, and the 6.4L engines
- Machined Billet extrusions with laser etched “Holley EFI” Logo
- Injector Clip feature retained so factory injector clips can be re-used. This is important as the clips locate the injector radially for proper injector spray pattern onto valves.
- -8 ORB ports front and back
- 1/8 NPT gauge ports machined directly into rail
- Mounting brackets and hardware included
Specs:
- Brand: Holley EFI
- Category: Fuel Injection - EFI
- Color: Black
- Emission Code: 5
- Engine: GEN 3 HEMI
- Fittings Included: No
- Fuel Injection Type: Port
- Fuel Injectors Included: No
- Fuel System Type: EFI
- Gasket Or Seal Included: No
- Grade Type: Performance
- Material: Aluminium
- Product Type: Fuel Rail
Tech Resources:
Gauge ports can be used as fuel feed connection with NOS P/N 17015NOS Rail feed from factory line can also be accomplished with P/N 534-211
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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.
