Diamond Eye K4327A 4" Turbo-Back Aluminized Exhaust with Muffler

Upgrade your 2000–2003 7.3L Powerstroke Cab & Chassis with the Diamond Eye K4327A 4" turbo-back exhaust system. Built from mandrel-bent 4" aluminized steel, this complete system replaces the restrictive factory exhaust from the turbo outlet back, delivering improved airflow, lower EGTs, better throttle response, and modest gains in horsepower and torque.

The included high-flow muffler provides a deep, aggressive tone while helping control cabin drone—giving you strong performance without excessive noise. Designed as a direct-fit, bolt-on kit that utilizes OEM hangers, the K4327A is engineered specifically for Cab & Chassis applications (automatic transmission, non-catalyst models).

Key Features

• 4" aluminized steel construction for durability and value
• Mandrel-bent tubing for maximum exhaust flow
• Turbo-back design (replaces the system from the turbo back)
• Includes high-flow muffler
• Single passenger-side exit
• Direct-fit / bolt-on installation
• Utilizes factory hangers
• Made in the USA
• 1-year limited warranty on aluminized systems

Performance Benefits

• Lower exhaust gas temperatures (EGTs)
• Improved throttle response
• Increased horsepower and torque potential
• Better fuel economy potential
• Deeper, more aggressive exhaust note with controlled sound levels

Fitment

• Years: 2000, 2001, 2002, and early 2003 (2003.5)
• Body Style: Cab & Chassis only (does not fit pickup bed models)
• Engine: 7.3L Powerstroke diesel
• Transmission: Automatic only
• Emissions: Non-catalyst models

The Diamond Eye K4327A is a proven performance upgrade for 7.3 Powerstroke Cab & Chassis trucks that need better flow, lower EGTs, and a more authoritative exhaust note while remaining practical for daily or work use.