AEM
AEM's Universal Programmable Engine Management System is engineered for fuel-injected competition vehicles. It includes 10 independent, built-in peak and hold injector-driver channels (for low-impedance injectors), direct-drive ignition (to drive a coil without an igniter or ignition module), and dual wideband UEGO controllers for tuning the air/fuel ratio. A wiring harness and sensors are sold separately. Information: AEM, 310.484.2322, www.aempower.com
Howell
Howell offers an extensive line of standalone and integrated wiring harnesses that adapt the late-model GM V-8 or 4.3L V-6 engines to any vehicle, with simple wiring connecting the harness to the battery and ignition power. Complete throttle-body kits are also available for virtually any engine for completing EFI swaps (YJ 258 kit shown). Information: Howell Engine Developments, 810.765.5100 www.howellefi.com
Painless Performance
In addition to swap harnesses for most of the Chevy LS family (works with manual transmission, O.E. ECM), Painless Performance offers a new Extreme Off Road Harness. This kit is designed specifically for wiring any non-street-legal rockcrawler, sandrail, or other off-road vehicle. Wire, connectors, and a weatherproof 10-circuit/four-relay fuse block are included. Painless also offers a swap harness for the 5.9L Cummins common-rail diesel. Information: Painless Performance Products, 800.423.9696, www.painlessperformance.com
Hesco
Jeep performance specialist Hesco is well versed in 4.0L straight-six repowering. Designers of the original harness to add multiport EFI to the 258 straight-six, Hesco also has a harness that converts '96-'06 4.0L engines back to '94-'95 OBD-I ignition systems. It is a direct fit for all '91-'95 engines except that the distributor and coil connectors have been upgraded to '98 specs. Information: Hesco, 205.251.1472, www.hesco.us
Hotwire Auto
Hotwire Auto offers a complete electronic system to swap a Gen III Hemi into a TJ. This kit now includes engine mounts and other hardware to make it functional and simple to install. These systems have been offered since 2004 for the TJ and are said to have passed the California emissions certification requirements. JK kits are also available. Information: Hotwire Auto, 479.243.9115, www.hotwireauto.com
ISIS
The ISIS Intelligent Multiplex System is a solid-state electrical system that eliminates the tangles of wire associated with traditional chassis wiring harnesses that typically control the fuel pump, starter, and other accessories. Multiplexing uses computerized power distribution to reduce the amount of wiring, reportedly slash install time in half, and increase performance. An optional remote control gives wireless control over any electrical accessory. Information: Littelfuse Inc., 847.824.1188, www.isispower.com