DIAMOND EYE 460020 DIESEL EXHAUST MUFFLER 4 INCH INLET/OUTLET PERFORATED PACKED 20 INCH OVERALL 14 INCH BODY STAINLESS EXHAUST MUFFLER

DIAMOND EYE 460020 is a universal 4.0" I.D. in / 4.0" I.D. out, straight-through, perforated & packed performance muffler built from T409 stainless steel. Its perforated core is wrapped in stainless mesh and fiberglass for high flow with a deep, controlled tone. Overall length is 20" with a 14" body and ~7" case diameter—ideal for tight diesel chassis where you still want real sound control.

FAQ: WILL THIS FIT MY TRUCK?

It’s a universal 4" I.D. muffler. If your system uses 4" tubing (common on many Ford Power Stroke, GM Duramax, and Dodge/Ram Cummins turbo-back kits), this will fit with standard 4" connections. Measure your available length (20" OAL) and confirm center-center orientation.

FAQ: WHAT’S THE SOUND LEVEL COMPARED TO LOUVERED MUFFLERS?

Perforated/packed cores like 460020 generally flow more and sound a bit more assertive than comparable louvered-core designs. If you want quieter, see the louvered alternatives in the Cross-Reference below.

FAQ: STAINLESS OR ALUMINIZED?

460020 is T409 stainless for long service life. If you’re cost-sensitive or in a dry climate, Diamond Eye also offers aluminized options in similar sizes.

Fitment Details

• Type: Universal diesel/gas 4" I.D. exhaust systems
• Inlet / Outlet: 4.0" I.D. (center / center)
• Recommended Uses: Turbo-back or cat-back builds where high flow and durable packing are desired
• Check Before You Buy: Verify you have 20" overall length space and 4" tubing, and plan for clamps or welding as needed.

Cross-Reference / Alternatives (Diamond Eye only)

• 460005 – 4" I.D. x 30" OAL, Aluminized, Louvered (quieter)
• 460031 – 4" I.D. x 30" OAL, Stainless, Perforated (longer / deeper tone)
• 460033 – 4" I.D., Stainless, Louvered & Packed (quieter stainless option)

Specifications