Efi Upgrade Kit
For larger capacity (4.6 litre and above) Performance engines using the original fuel injection system, considerable gains in torque and horsepower are attainable by fitting an Efi Upgrade Kit. Kits are available for both Flap-type and Hotwire efi systems and comprise a ported and enlarged inlet manifold (inlet tract opened out to 45mm diameter), trumpet base with enlarged (45mm diameter) intake trumpets and plenum chamber with enlarged (72mm diameter) throttle body. These components help to remove the restriction in air flow, which can strangle your engine's power potential. Efi Upgrade Kits are sold on an exchange basis. See also our Re-mapped & Re-chipped ECUs.