I have found several toolboxes that will fit your 2006 Mitsubishi Raider, however, the DeeZee Toolbox # DZ8748HDS is not one of them that will sit below your rails.
The 3 series of toolboxes that should fit below your rails are DeeZee # DZ8537, # DZ8546, and # DZ9560, however, you will need to measure the bed of your truck to pick the right toolbox for you.
The DZ8537 series is 37-1/8 inches long, 19 inches wide and 15-9/10 inches high. There is also a black version, # DZ8537B. I have... view full answer...
For a 4-way wiring harness recommendation for your 2007 Mitsubishi Raider you would want the Curt T-Connector Vehicle Wiring Harness # 55323. I attached an install video for you to check out as well.
Now to convert this to a 7-way you will need the part # 37185. view full answer...
The trailer wiring harness part # 118323 that you referenced is the correct harness for your 2007 Mitsubishi Raider. It does not have a converter on the harness though so that indicates that it picks up a stoplight circuit directly from the harness and the vehicle does not use variable voltage for stoplight activation. That style of taillight circuit is referred to as multi-plexed. view full answer...
For your 2006 Mitsubishi Raider, the Derale Series 9000 Plate-Fin Transmission Cooler Kit w/ NPT Inlets - Class I -Extra Efficient # D13611 is a small but strong transmission cooler. It requires no extra fittings for installation.
For a better transmission cooler, I recommend the Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class III - Efficient # D13503. This cooler is designed for Mitsubishi Raiders with late-model, electronic overdrive transmissions. This... view full answer...