GT4 Mustang

  • A fantastic and sporty daily driver
  • Similar performance to a BOSS 302, with more creature comforts
  • Plenty of added performance to up the fun factor and not break the budget
  • Available for V8 and V6 Mustangs
  • Designed to be track capable, right off the street


Getaway in a Kenny Brown GT4 Mustang, a premium performance car specifically designed for sport touring or ultra-sporty street performance.  This pony has comparable performance to a Boss 302 Mustang, but with more creature comforts and a significantly refined platform. Whether you're sprinting around town, carving through twisty back roads, or cruising down the interstate, the Kenny Brown GT4 Mustang is guaranteed to give you the maximum SPM’s or "Smiles per Mile".  The GT4 is also a fully track capable machine for the occasional foray into the realm of Walter Middy.  It contains everything you need to play with the big boys on the open-track while placing special emphasis on cost and maintenance. 

The Coyote 5.0 TiVCT high-revving engine is pumped up to 435 horsepower with a cold air inlet and high flow throaty mufflers.  The “secret sauce” to its incredible handling and confidence-inspiring driving characteristics is the underpinnings of Kenny’s latest critically acclaimed AGS 4.0 Advanced Geometry Suspension System. Other high-performance upgrades include; short-throw shifter, wheels, tires, and larger brakes as part of the base package to give the car a proper balance and support more aggressive driving demands.  As always, a plethora of performance options are available to truly make your GT4 a custom creation.

Kenny Brown GT-4 Series Mustang conversions are available for 2011-2014 Mustang GT’s with the 5.0L Coyote engine, BOSS 302 Mustangs and Shelby GT500’s.

Special versions of the GT-4 Series are also available for 2011-2014 V-6 Mustangs, and 2005–2010 Mustang GT’s and Shelby GT500’s.

Content based on a 2012-13 Mustang GT with the Track Pack option. Content varies slightly with stock GT, V6 or GT500.

We offer a free design service with many options to further customize your Kenny Brown Mustang to make it your own. It's on the house - extra service and advice with Kenny involved from the start to oversee your project. We can help as little or as much as you would like.  You'll see and we can create a plan that meets your goals and budget… and when you're ready, we'll bring the project to life.  Our design experts can work with you by phone, online or by visiting our Performance Center.

  • HO Engine Pack - 435 HP
    • Cold Air Intake Kit
    • Custom Calibration

  • Stainless steel axle-back high-flow mufflers

  • Performance Shifter

Rear End
  • Boss 302 Aluminum Differential Cover
  • Torsen differential
  • 3.73:1 Final drive ring & pinion

  • HD aluminum radiator
  • Engine Oil Cooler

High Performance Brakes
  • Brembo GT Track Pack Mustang calipers front

Wheels & Tires
  • High-Performance tires -- 275/35/R19 front and rear

Chassis Support
  • KB Jacking Rails
  • KB Extreme Matrix Chassis Support System

  • Kenny Brown AGS 4.0 Street Sport Suspension
    • Advanced Geometry Suspension Syste
    • Adjustable front Sway Bar

Track/Sport Springs and Shocks
  • KB Spec Street Sport Performance Shocks
  • KB selected spring rates
  • Adjustable ride height

  • Side Skirt Splitters
  • Paul Brown Racing Rear Sport Spoiler
  • Custom Graphics

  • Driver’s left foot dead pedal
  • RECARO GT Track Pack Mustang Seats

Serialization & Graphics
  • Dash plaque & Under hood production plaque
  • Special exterior GT4 graphics package

  • Please call our Performance Center to talk with one of our design pros about all the options available to further custom tailor your Mustang for your specific requirements.  Call 317-396-2768 or email to


2013 Kenny Brown GT4 Custom Conversions Starting at $11,750

Final cost will vary as each Kenny Brown Mustang is hand build, bespoke with content specific to the individual’s needs and budget.