From Motor Trend: "The 427R stripes and decals accompany a revised Roots-type supercharger and intercooler plus other powertrain upgrades that bring the stock 4.6L SOHC three-valve motor up to 435 hp and 400 lb-ft of torque. And what's more, they do so WITHOUT incurring a gas-guzzler penalty as the 2009 427R did. That savings helps bring the 427R package price in at just $15,056 ($43,071 out the door, including the base Mustang GT)."
From Mustang Heaven: Core Components - $14,156 + S&H
ROUSHcharged 4.6L powertrain system
ROUSH Front Fascia with Driving Lamps
ROUSH Front Chin Spoiler
ROUSH Side Rocker Splitters
ROUSH Rear Valance
ROUSH Rear Decklid Spoiler
ROUSH Fender Badges and Rear Decklid Emblem
ROUSH Front Windshield Banner
ROUSH 427-R Striping Kit
ROUSH Four-Piece Performance Pedals
ROUSH Embroidered Floor Mats
ROUSH Center Console Badge/Button
ROUSH Billet Aluminum Shifter Handle with Grips (Manual Transmission Only)
ROUSH 18-Inch Cast Chrome Wheel With High Performance Tires
ROUSH Suspension System
ROUSH Engine Build Plaque
ROUSH 427R Serialized Engine Bay Plaque
Optional Components
ROUSH White Face Gauges - $320
ROUSH Exhaust - $710
ROUSH Rear Quarter Window Louvers - $370
ROUSH Convertible Light Bar - $910
ROUSH Sport Leather Seating - $1,725
ROUSH Vent Pod With Boost Gauge - $435
ROUSH 20-Inch Cast Chrome Wheel & Tire Upgrade - $1,115
Locking Lug Nuts - $60
ROUSH Short Throw Shifter - $310
ROUSH Short Throw Shifter With Chrome Shifter Arm And White Ball Knob - $410
ROUSH Short Throw Shifter With Chrome Shifter Arm And Black Ball Knob - $410
ROUSH Trunk Mounted Tool Kit - $355
ROUSH Illuminated Door Sill Plates - $220
ROUSH Door Sill Plates (Non-Illuminated) - $57
ROUSH Big Brake Upgrade - $2,877
ROUSH Sport Brake Kit - $1,450
ESCORT Passport 9500ci Radar/Laser Defense System - $2,200