There comes a point in the quest for more horsepower where stock side-feed type injectors simply become out-classed. BDE fuel rails work with the stock upper plenum and allow the VG30DE(TT) to take advantage of the higher flow capacities and superior technology of top-feed injectors. BDE fuel rails are anodized black and feature o-ring port inlets and outlets for guaranteed leak-free performance while the mounting hardware is designed to prevent metal to metal contact and insulate the fuel rails and injectors from thermally conducted engine heat.

Kit Consists of...

• BDE top-feed fuel rails - includes mounting blocks, machine screws, -6AN Orb Adapters, etc.
• Lower plenum - Two kits are available, one with a modified lower plenum which retains stock injector height, and one with bolt-on lower plenum adapters which raises the point of injection by 11mm. These will only fit early-style (90-94 TT) plenums.
• Crossover/balance tube - Modified to clear the fuel rails, the idle air inlets on the balance tube need to be moved. Modified balance tubes eliminate the charcoal canister nipple and feature -8 AN flares to allow AN hose ends to be connected to the idle air inlets. Cores may be NA or TT versions, but must be Z32 variants (sorry, no J30 Balance Tubes).
• Upper plenum - Three bosses are removed to clear the fuel rails and mounting hardware and the entire kit is fit tested prior to shipping. Note, if your plenum has been chromed, removal of these bosses will damage the chrome finish, BDE does not re-chrome or re-polish these areas after modification.
• Throttle cable bracket -The cruise control cable notch is removed from the throttle cable bracket for clearance to the fuel rails.
• Hose end adapter fittings (Qty 4) - #8 flare to #6 o-ring, fully drilled #8 size, zinc plated steel, includes o-rings.
• Injector Dynamics (ID) Injectors (Qty 6 needed, includes wire pigtails) - recommended for trouble free fit and performance with BDE fuel rails.

What's So Special About ID Top-Feed Injectors?

• Dead time and flow rate relative to voltage and fuel pressure are fully mapped for each injector and then matched into sets of six. No other injector supplier provides this information!
• Linearity, ID injectors feature exceptional low pulsewidth linearity for easy, predictable idle tuning and ECU compensation for changing conditions.
• ID Top-feed injectors are available in 725, 1000 and 2200 cc/min flow ratings (all rated at 43.5psi) which opens up the potential to make well over 2000HP with one injector per cylinder in a six-cylinder engine.
• All are E85 compatible.
• 725s and 1000s are both lower price than side-feed injectors.
• 2200cc/min!!! Methanol, anyone?
• The lightweight actuator allows cycle periods as low as 1.07 Ms and safe duty cycles approaching 94%.
• High impedance coils means resistors or an injector driver is not needed, the stock Z32 ECU will power these injectors (with the proper tune).

Combined, these attributes add up to the ability to use high flow-rate injectors with brutal HP potential while maintaining excellent low speed drivability.

Please select the core options from the drop-down boxes above. If you are comfortable performing the necessary modifications yourself, you can order the rails alone. Or, if you prefer to avoid the core charges, your components can be sent in for modification first. If you opt to have pre-modified parts sent to you, the core charge is refundable once your good cores are sent back to us. Stripped bolt holes can be helicoiled for $15 each, or if broken, BDE will weld and helicoil for $35 each. Powdercoated or chromed cores are not acceptable for exchange.

Installation instructions can be found below:

BDE Top-Feed Fuel Rail Installation Instructions - Stock Injector Depth

BDE Top-Feed Fuel Rail Installation Instructions - Bolt-In Lower Adapters

Please visit BDE's webpage directly for up to date installation instructions that you can find here.