Toyota Tacoma, the best-selling small truck in the U.S. has two new limited-edition trim packages for the 2011 model— both based on the Tacoma TX project vehicle shown at last year’s SEMA Show.

The T|X and T|X Pro packages build upon the Tacoma’s current Off-Road Package by adding new wheels, exhaust and appearance items from Toyota Racing Development’s accessory catalog. Accessory packaging is extremely popular with Tacoma owners.

T|X stands for “Tacoma | Extreme.”

The standard TRD Off-Road Package, at the foundation of both T|X editions, includes an electronic locking rear differential, progressive-rate front springs, specially tuned Bilstein shock absorbers, a 28 mm front stabilizer bar and BFGoodrich Rugged Trail tires. In addition the TRD Off-Road Package includes a 400-watt/115-volt power point in the bed, sport seats with adjustable lumbar support and unique fabric, plus an overhead console with a compass and outside temperature display.

The Base T|X trim adds beefy TRD 16-inch black alloy bead-lock wheels and 265/70R16 BFGoodrich Rugged Trail tires for extra capability off-road over the standard TRD Tacoma. It also features black tube side steps, a stainless-steel exhaust tip and unique exterior graphics. The MSRP of the T|X Package is $1,699, a savings of $754 compared with the package items ordered as separate options.

The T|X Pro Package adds performance flare with a TRD cat-back performance exhaust system that gives the Tacoma’s 4.0-liter V-6 a deeper note and slightly more power. Also priced at an MSRP of $1,699, the T|X Pro Package represents a savings of $720 compared with the package contents added as separate accessories.

Ordering for the 2011 Tacoma T|X Pro Package will begin in July, and the T|X Package will launch two months later in September.

In an unrelated announcement yet occurring at the same time, Toyota sources reveal that the 2.7 four-cylinder version of the  4Runner is being discontinued after just one model year. The main reason for the drop is the extremely low purchase rate, with the V-6 model accounting for well over 90 percent of 4Runner sales. One key reason could be that there is very little difference in gas mileage performance between the 4 and 6 cylinder engines.