Auburn Gear
What: Pro Series and High Performance Series limited-slip differential.
Where: 260/925-3200, auburngear.com
Wares: A unique cone-clutch design to transfer more power to the high-traction wheel for quick acceleration and tight cornering.
Words: "Torque transfer of Auburn Gear limited-slip differentials is achieved through the use of cone clutches coupled to beveled side gears."
Wallet: Around $400.
Advanced FLOW engineering (aFe)
What: Stage 2 cold-air intake for the 5.4L V-8.
Where: 951/493-7100, afepower.com
Wares: Has 31/2-inch 409 stainless steel, powdercoated intake tubes, and an 18-gauge powdercoated heatshield, plus an advanced filter with special media.
Words: "Designed to maximize air velocity and improve horsepower, torque, throttle response, and mpg."
Wallet: Starts at about $362.
AIRAID Filter Co.
What: 4.6L and 5.4L QuickFit cold-air intake.
Where: 800/498-6951, airaid.com
Wares: Includes premium filtration technology and all hardware to mount directly to the stock lower airbox with the OE mounting clips.
Words: "Adds significant increases in torque, horsepower, and overall performance."
Wallet: MSRP is about $407.
Banks/Gale Banks Engineering
What: Monster exhaust.
Where: 800/438-7693, bankspower.com
Wares: Lightweight, direct-fit polished-stainless, straight-through muffler, with 6x5-inch weld-on, ob-round, polished-stainless. angle-cut, rolled-edge tip.
Words: "This lightweight, direct-fit-system [cuts] backpressure up to 79 percent and [increases] flow up to 138 percent."
Wallet: Less than $600.
EBC Brakes
What: Brake upgrade.
Where: Pep Boys, ebcbrakes.com
Wares: Yellowstuff-grade high-friction pads for front and rear.
Words: "Pads all arrive with shims, slots, and chamfers, and the unique EBC Brake-In coating for fast seating of pads after install."
Wallet: Yellowstuff starts at $119.
Gibson Performance Exhaust
What: After-cat systems for the 4.6L and 5.4L V-8s.
Where: 866/533-2815, gibsonperformance.com
Wares: Mandrel-bent tubing, a Superflow performance muffler with SFT technology, a chambered and louvered design, and 3 1/2-inch polished stainless steel tip(s).
Words: "Offers up to four exhaust exits, and each will add up to 17 hp and some serious torque for hauling and towing, with a two percent increase in fuel economy."
Wallet: Starts at about $361 for single exhaust.
Diesel Performance Parts (DPPI)
What: MBRP single side exhaust.
Where: 866/455-7788, dieselperformanceparts.com
Wares: Chambered muffler; mandrel-bent tubing and mirror-polished T304 stainless steel tip.
Words: "Available in three material grades: Pro T304, XP T409, and Installer Series aluminized."
Wallet: Starts at about $410.
Heartthrob Exhaust
What: Performance exhaust.
Where: 320/693-0222, heartthrobexhaust.com
Wares: Uses 16-gauge aluminized steel, and starts at the flange after the converters and becomes a 3-inch single, with fully welded Velocity Series performance muffler and split rear dual 21/2-inch tailpipes.
Words: "This kit fits all wheelbase models, two- and four-wheel drive, 4.6L and 5.4L."
Wallet: MSRP is $303.
K&N Engineering
What: High-flow intake system for the 5.4L V-8.
Where: 800/858-3333, knfilters.com
Wares: The original intake assembly is replaced with an all-new intake design, which draws air through a high-flow air filter. A powdercoated heatshield replaces the stock airbox. Air travels through a large-diameter roto-molded polyethylene tube.
Words: "Increases horsepower by 11.21 at 4,600 rpm over the F-150's stock configuration."
Wallet: MSRP is $449.
Superchips
What: Ford Gas Flashpaq for tuning.
Where: 407/585-7000, superchips.com
Wares: Includes diagnostic scan tool, real-time in-cabin vehicle sensor display, data logger for 0-60mph and quarter-mile times, and the ability to recalibrate the speedo for tire and gear changes.
Words: "Includes multiple performance and towing tunes while working out of the box with many aftermarket hard parts."
Wallet: Less than $400.