2003 Ford Mustang Article at Automotive.com
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2003 Ford Mustang Cobra

Below is an enthusiast article written by the automotive experts at 5.0 Mustang & Super Fords. We take a look at Matt Knab's single-turbo 2003 Ford Mustang Cobra
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2003 Ford Mustang Cobra - Down With The Single

2003 Ford Mustang Cobra Turbo Engine

After damaging a piston in the stock short-block, Matt and his buddy Chris Herring removed the engine and hauled it to Al Papitto at Boss330 Racing for a rebuild. The stock bottom end received a 0.020-inch overbore before the stock Cobra crankshaft, Oliver billet connecting rods, CP pistons, Total Seal piston rings, and ARP hardware were reinstalled. Al also worked over the stock Four-Valve heads with mild porting, Ferrea valves, Crower valvesprings, '01 Cobra intake camshafts, and stock '03 Cobra exhaust camshafts. Since the Hellion Power Systems single-turbo kit Matt added does away with the stock blower, an '01 Cobra intake with a ported lower was installed in its place. With a ball-bearing Q-Trim 76mm single turbo, the Cobra has made 718 hp and 746 lb-ft of torque. In case he needs more, Matt added an NX dry-nitrous kit with the company's boost-referenced progressive controller, which can program a nitrous curve. The nitrous purges via an intercooler spray bar.

5.0 Tech Specs
ENGINE AND DRIVETRAINELECTRONICS
BlockEngine Management
Stock '03 Cobra, 0.020-in overboreStock Computer, SCT Pro Racer
DisplacementPackage flash tuning
283ciIgnition
Rotating AssemblyStock '03 Cobra, NGK BR7EF
Cobra crankshaft, Oliver billetspark plugs
connecting rods, CP customGauges
pistons, Total Seal rings, FederalStock, Auto Meter Phantom
Mogul bearings, ARP main studs,boost and fuel pressure, Raptor
Canton oil pan and windage trayshift light, Innovate Motorsports
CamsWideband with air/fuel gauge
01 Cobra intake camshafts, stock 
exhaust cams SUSPENSION AND CHASSIS
HeadsFront Suspension
Stock, mild porting, bronzeK-member
valveguides, Ferrea stainlessMaximum Motorsports tubular
steel valves, Crower valve-Control Arms
springs, ARP studsMaximum Motorsports tubular
IntakeStruts
Stock '01 Cobra, ported lowerStock
Throttle BodySprings
Accufab twin 60mmHypercoil 350 lb-in coilovers
Mass AirCaster/Camber
SCT BA 2800Maximum Motorsports
Power AdderBrakes
Hellion Power Systems single-Stock
turbo system, ball-bearing Q-TrimWheels
76mm turbo, stainless steel piping,BBS RK Plasma 18x81/2-in
ceramic-coated hot side, NitrousTires
Express nitrous kit245/40/18
Fuel SystemRear Suspension
Dual Ford GT Supercar fuelShocks
pumps, 8-gauge wire running dual'00 Cobra R
fuel-pump driver modules, -6 linesSprings
from fuel hat to Y-block, -8 line toHypercoil 550 lb-in coilovers
stock fuel rails, Siemens 60-lb/hrControl Arms
injectorsStock
ExhaustBrakes
Borla Stinger Cat-Back exhaustStock
TransmissionWheels
T56, 26-spline input shaft, McLeodBBS RK Plasma 18x10-in
throwout and pilot bearing, FidanzaTires
aluminum flywheel, SPEC Stage 3+Nitto 555R Extreme Drag radial,
clutch, Pro-5.0 shifter305/35-18
RearendChassis Stiffening
Stock IRS 8.8, 3.55 gears, TheKenny Brown Performance weld-
Driveshaft Shop Level 5 half-in subframe connectors, matrix
shafts, Maximum Motorsportsbrace, jacking rails, Steeda
IRS bushings, Kenny BrownAutosports strut-tower brace
Performance aluminum differential 
bushings, Billetflow differential 
brace 

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2003 Ford Mustang