Internal Disc Series are a beautifully styled, conventional-looking, chrome muffler. They provide 10 15% horsepower gains. Internal Disc Series Slip-Ons and Systems utilize our patented Tunable Disc Technology

Internal Disc Series are SAE-J2825 sound compliant. They feature a rebuildable core and packing to help minimize your maintenance. Internal Disc Series are compatible with 5 End Cap options.

Internal Disc Series Slip-Ons are available for 85 14 Baggers, 2010 Road Glide / Street Glide ,14 and earlier model Tri Glides, 97 07 Softails and 99 11 Dynas. Select models include Fishtail, Tapered or Turndown End Caps. Twenty-four, 3 discs are also included. Internal Disc Series Slip-Ons are compatible with our True Duals and our Crossover Conversion.

Internal Disc Series 2:1 Systems are available for 07 11 Softails and include a Fishtail End Cap. Heat shields are included. Eighteen, 3 discs are also included.

Internal Disc Series 2:2 Crossover Systems are available for 97 06 Softails and include a Fishtail End Cap. Heat shields are included. Twenty-four, 3 discs are also included.

Internal Disc Series 2:2 Staggered Dual Systems are available for 86 02 Softails. Tapered Slash End Caps are included. Heat shields are not included with this system. Thirty-six, 3 discs are included with these systems.

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

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

Note: Sound test data on '10 - '14 model specific slip-ons was achieved using the OEM CAT equipped headpipe. Use of these mufflers on headpipe with the CAT removed or True Duals will result in substantially louder results. Optional cores are available for certain models at an additional cost.

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Universal Internal Disc Series for Unique Applications

Disc Installation Video

How To Re-Pack a SuperTrapp Exhaust

3" Tunable Disc Accessories

Internal Disc Series End Cap Options

Internal Disc Series Videos

Bagger Slip-Ons Sound Chart

Bagger Slip-Ons dB Levels and Disc Configurations

Where To Locate Part Number on Pipe

For CARB compliance info, use Find My Exhaust.



Click any Model # for more details.

DESCRIPTION: MODEL# MSRP
2:1 SYST:HD FLST/FXST, '07-11 w/O2, CHRM 628-71570 $1,005.00
2:2 SYST:H-D FLST/FXST '97-06 628-78082 $1,795.00
S/Os HD FLH/FLT, FISHTAIL CAP 95-14, CHR 628-78054 $756.00
S/Os HD FLH/FLT, TAPERED END CAP 95-14 628-78055 $670.00
S/Os HD FLH/FLT, TURNDOWN CAP 95-14, CHR 628-78053 $756.00
S/Os HD FLSTS/SC Sprng Fishtail 97-07,CH 628-78056 $756.00
SLIP-ONS :H-D FXD '99-11* except FatBob 628-78088 $595.00
SLIP-ONS:H-D FLH/FLT,FISHTAIL '85-94 628-78051 $756.00
SLIP-ONS:H-D FLH/FLT,TURNDWN '85-94 628-78050 $756.00
SLIP-ONS:H-D FLH/LT,TAPERED '85-94 628-78052 $670.00
STAG DUALS:H-D FXST/FLST '86-02 628-78060 $865.00

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