Universal Internal Disc Series are 3” Chrome Plated Steel internal, disc-based mufflers that utilize our patented Tunable Disc Technology. They are rated top in their class for providing maximum silencing.

Their 3.5” body diameter tapers down to a 2.125” opening. All Universal Internal Disc Series main portion of the body are 12” in length. The overall length of the body including the inlet is 15".

Universal Internal Disc Series with a Tapered End Cap have a 1.75”(44.5mm) inlet diameter (ID). It adds another 4" to the exhaust. Twelve, 3” discs are included. Brackets are not included.

Universal Internal Disc Series with a Slash Cut End Cap have a 1.75”(44.5mm) ID. It adds another 6" (measuring from the long side) to the exhaust. Twelve, 3” discs are included. Brackets are not included.

Universal Internal Disc Series without an End Cap have a 1.75”(44.5mm) or 2.00”(50.8mm) ID. Eighteen, 3” discs are included. Brackets are included.

Add 3" discs to increase horsepower, exhaust tone and flow.

Subtract 3" discs to reduce sound and increase low-end torque.

BUY NOW BY CLICKING ON THE PART NUMBER!

How do you know which Universal Exhaust will fit your application? It’s easy! Click here and we’ll tell you how!

Disc Installation Video

How To Re-Pack a SuperTrapp Exhaust

3" Tunable Disc Accessories

Videos of V-Twins with Internal Disc Series

Automotive Videos

Where To Locate Part Number on Pipe

Mufflers sold with end caps do not have brackets.

Click any Model # for more details.

DESCRIPTION: MODEL# MSRP
3" INT. DISC UNIV:1.75'' ID, CHROME 328-1719 $319.00
3" INT. DISC UNIV:2.00"ID,CHROME 328-2019 $319.00
3" INT.DISC UNIV:1.75"ID, CHROME TAPERED 358-1719 $389.00
3" INT.DISC UNIV:1.75"ID,CHRM. SLASH CUT 358-1721 $389.00

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