DIAMOND EYE K4338A CAT BACK EXHAUST SYSTEM FOR 03-07 FORD F250/F350 SUPERDUTY 6.0L 4 INCH WITH MUFFLER SINGLE PASS ALUMINIZED

DIAMOND EYE K4338A is a 4.0" aluminized steel cat-back exhaust engineered for the 2003.5–2007 Ford F-250/F-350 6.0L Powerstroke. Mandrel-bent tubing and a straight-through muffler reduce backpressure to help lower EGTs, sharpen throttle response, and deliver a deep, controlled tone.

FAQ: WILL THIS FIT MY 6.0L SUPER DUTY?

Yes—this kit is designed for 2003.5–2007 Ford F-250/F-350 6.0L Powerstroke, and is trimmed/assembled per the instructions to fit all cab and bed lengths (see cut-to-length intermediate pipe note in the instruction sheet). Always confirm model year & emissions equipment before installation.

FAQ: WHAT COMES IN THE BOX?

Converter-back intermediate pipe, straight-through muffler, tailpipes, clamps/hanger clamps, and detailed instructions. Reuses OEM hanger locations for a clean, bolt-on install.

FAQ: EMISSIONS / CATALYTIC CONVERTER?

This is a catalytic converter–back system. It does not replace or remove the catalytic converter. (If your vehicle is equipped with a catalytic converter, it is unlawful to remove it.)

Fitment Details

• Vehicle: 2003.5–2007 Ford F-250/F-350 Super Duty, 6.0L Powerstroke diesel
• Configuration: Single passenger-side rear exit
• System Type: Cat-back (converter-back)
• Tubing Diameter: 4.0" (mandrel bent)
• Muffler: Straight-through, stainless internal construction

Cross Reference & Related Items

• K4338A-RP — 4" aluminized cat-back, no muffler (replacement pipe)
• K4338S — 4" 409 stainless cat-back with muffler
• K5344A — 5" aluminized cat-back with muffler (single side)

Specifications