storage boxes. TRD package equipped Tacomas also feature an in-bed 115 V/400 W AC power outlet. The tie down cleats are rated to hold up to . TRD packages The Tacoma is offered in two TRD packages: Sport and Off-Road. The Sport is targeted more towards improved on-road performance, while the Off-Road is more geared towards the off-road enthusiast. Both are available in 2WD or 4WD, with rear electronic locking differential available only in the Off-Road model. Both variants come with TRD-specific seats, and 400-w AC power inverters mounted in the bed. A TRD supercharger for the 1GR-FE was a dealer-installed option. TRD offered a cold-air intake and cat-back exhaust system through Toyota dealerships. Also available are TRD cosmetic accessories such as aluminum front skid plate, along with shift knobs (A/T and M/T), radiator cap, oil filler cap, and exhaust tip. TRD also sold seat covers for these Tacomas, but only fit the 2005–08 models (09-15 have airbags in the seats, 2005–08 do not). The TRD Sport package sells in two levels. The first level has a color-matched grille, color-matched front/rear bumpers/door handles/mirrors, and hood with nonfunctional scoop, Bilstein shocks/struts, stainless steel exhaust tip, and aluminum 17-in wheels with 265/65R17 tires. The second level includes the above and adds a towing package (oil and transmission coolers, fan clutch) and heavy-duty high output alternator and battery. The 2005–08 model years came with a mechanical limited-slip differential. The 2009–15 model years have an open differential with a brake-assisted "automatic limited slip" rear differential, similar to a VSC system. The basic TRD Off-Road package includes none of the color-matched body parts (black door handles/mirrors, chrome bumper/grille). Different from the off-road package, the Technology Package has color-matched body parts, aluminum 16-in wheels, Bilstein shocks, skid plates, and electronic locking rear differential but does not include the hood scoop from the Sport models. The off-road package included certain features that are useful for off-roading, such as those mentioned earlier, while the Technology Package features include A-TRAC (2009–15), Hill Descent assist (automatic transmission only) and Hill Start assist (manual transmission only). Progressive-rate springs are included, and smaller-diameter sway bars compared to the Sport package, which gives the Off-Road more wheel articulation and a smoother ride, but allows for more body roll. The towing package upgrades the battery, alternator, and fan clutch, and includes oil/transmission coolers (same as the Sport). All-terrain tires (265/70R16) and a heavy duty