Diamond Eye Performance is an industry-leading manufacturer of high-flow diesel and gas truck exhaust systems. Precision-engineered using CNC mandrel-bending technology, Diamond Eye offers direct-fit turbo-back systems, downpipes, cat-back exhausts, smoke stacks, and mufflers designed to lower EGTs, boost horsepower, and improve fuel efficiency under heavy towing and street conditions.

Why Choose Diamond Eye Performance?

  • CNC MANDREL BENDING

    Smooth CNC mandrel bends eliminate exhaust flow restrictions, lowering exhaust gas temperatures (EGTs) and increasing horsepower and torque under heavy towing loads.

  • DIESEL & TRUCK SPECIALIZATION

    Engineered specifically for Powerstroke, Cummins, Duramax, and gas truck platforms to deliver aggressive tone, high-flow velocity, and direct-fit bolt-on alignment.

  • ALUMINIZED & STAINLESS OPTIONS

    Available in economical heavy-duty aluminized steel for dry climates or 409 stainless steel for ultimate corrosion resistance in harsh winter environments.

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Diamond Eye Performance: Frequently Asked Questions (FAQ)

What is the difference between Turbo-Back, Cat-Back, and DPF-Back exhaust systems?

Turbo-back systems replace the entire exhaust from the turbocharger back for maximum flow gains. Cat-back systems connect behind the catalytic converter to improve sound and airflow while remaining emissions-friendly. DPF-back systems install after the Diesel Particulate Filter to enhance rear exit styling without affecting emissions equipment.

Should I choose Aluminized Steel or Stainless Steel for my Diamond Eye exhaust?

Aluminized steel is ideal for dry regions or budget-conscious builds looking for great performance. 409 stainless steel is highly recommended for Northern and coastal climates exposed to road salt and moisture, offering superior long-term rust prevention.

How does upgrading my downpipe help my diesel truck?

Factory downpipes often feature restrictive flattened bends. Diamond Eye smooth-mandrel downpipes increase exhaust velocity right off the turbo turbine wheel, significantly reducing EGTs, improving throttle response, and aiding spool times.

What are the benefits of a Diamond Eye Muffler Delete Pipe?

Muffler delete pipes replace the restrictive factory muffler with a straight-through pipe section. This delivers a much deeper, louder exhaust note, sheds heavy chassis weight, and maximizes exhaust gas flow.

What components are included with Diamond Eye Smoke Stack kits?

Diamond Eye bed-stack kits typically include the bed flex tubing, T-pipe adapter assembly, and heavy-duty mounting clamps designed to channel exhaust up through the truck bed to feed dual or single stack tips.