Diamond Eye Performance K4308S 4-Inch Turbo-Back Dual Exhaust – Ford 7.3L Powerstroke

The Diamond Eye Performance K4308S 4-Inch Turbo-Back Dual Exhaust System is engineered for 1994–1997.5 Ford F-250 and F-350 trucks equipped with the 7.3L Powerstroke diesel engine. Constructed from durable T409 stainless steel, this system improves exhaust flow, reduces exhaust gas temperatures, and enhances overall engine efficiency while retaining emissions compliance.

This turbo-back dual exhaust system is designed to re-incorporate the factory catalytic converter and includes a 3-inch two-piece downpipe. The system bolts on using factory mounting locations and is designed to fit all cab and bed lengths. With its 4-inch main tubing and dual rear exit configuration, the K4308S delivers improved throttle response, a deeper diesel tone, and long-term corrosion resistance—ideal for towing, daily driving, and performance applications.

Key Features

• 4-inch turbo-back dual exhaust system

• Designed for 7.3L Powerstroke diesel engines

• Retains factory catalytic converter

• Includes 3-inch two-piece downpipe

• Improves exhaust flow and reduces EGTs

• Durable T409 stainless steel construction

• Direct-fit system using factory hangers

Technical Specs

• Exhaust Type: Turbo-Back Dual

• Tubing Diameter: 4-Inch

• Downpipe Diameter: 3-Inch (2-piece)

• Material: T409 Stainless Steel

• Vehicle Engine: 7.3L Powerstroke Diesel

• Vehicle Fitment: F-250 / F-350

• Cab & Bed Lengths: All

• Catalyst: Reuses factory catalytic converter

• Emissions Compliance:

  • C.A.R.B. Exempt

  • Executive Order #: D-778

• Exit Style: Dual Rear Exit

Vehicle Fitment

• 1994–1997.5 Ford F-250 – 7.3L Powerstroke Diesel

• 1994–1997.5 Ford F-350 – 7.3L Powerstroke Diesel

  • All cab lengths

  • All bed lengths