These 4 diameter disc-based Megaphone Series are our signature muffler that utilize our patented Tunable Disc Technology and provide significant horsepower gains. Megaphone Series are SAE-J2825 sound compliant.

Megaphone Slip-Ons are available for 95 & up Baggers and '09 & up Tri Glides. They provide an 8 - 10% horsepower gain. Megaphone Slip-Ons are compatible with our True Duals and our Crossover Conversion.

Megaphone 2:1 Systems are available 91 05 Dynas, 86 99 Sportster XLH, 84 94 FXR models and 71 84 Shovelheads. Does not fit Custom or 883R.

Megaphone 2:2 Systems are available for 86 99 & 04 & up Sportster XLH, 08 & up Sportster XR1200 and 90 and later Sportster XR750. The 2:2 XR Style system provides a bolt-on 20% horsepower gain.

The classic Megaphone design allows the exhaust gas to expand which increases power. Discs let you control the flow. Optional Open End Caps for closed course competition are also available.

Twelve - 4 discs, a Closed End Cap and all necessary mounting hardware is included with Slip-Ons and the 2:1.

Twenty-four - 4 discs, Closed End Caps and all necessary mounting hardware is included with the 2:2.

Add 4 discs to increase horsepower, exhaust tone and flow.

Subtract 4 discs to reduce sound and increase low-end-torque.

Note: Sound test data on '10 & up 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 Megaphones for Unique Applications

4" Tunable Disc Accessories

Disc Installation Video

Closed End Cap vs. Open End Cap Video

How To Re-Pack a SuperTrapp Exhaust

Megaphone Series Videos

Bagger Slip-Ons Sound Chart

Bagger Slip-Ons dB Levels and Disc Configurations

Click here to read the 2:2 XR Style Race System article in IronWorks Magazine.

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 HD XLH 883-1200 86-99 Satin SS 825-70883 $689.00
2:1 HD XLH883-1200 86-99 Polished SS 826-70884 $789.00
2:1 SYST:H-D SHOVELHEAD '71-84, CHROME 828-77470 $949.00
2:2 RACE SYST H-D XLH883-1200 '04-13*, S 815-71202 $999.00
2:2 Race Syst H-D XLH883-1200 86-99 SS 815-70883 $999.00
2:2 RACE SYST H-D XR1200 '08-12* 815-71210 $1,199.00
2:2 SYST:H-D FXR '84-94, CHROME LOW 828-71335 $999.00
SLIP-ONS:H-D FLH/FLT'95-14,CHR SLASH MEG 728-78054 $729.00
SLIP-ONS:H-D FLH/FLT'95-14,CHROME MEG 728-78053 $729.00
SS SYST:H-D FXD '91-05 ,2:1 SATIN 825-71358 $729.00
SS SYST:H-D FXD '91-05, 2:1 POLISHED 826-71359 $899.00
SS SYST:H-D FXR '84-94, 2:1 POLISH HIGH 826-71357 $899.00
SS SYST:H-D FXR '84-94, 2:1 SATIN HIGH 825-71356 $729.00
SS SYST:H-D SHOVELHEAD '71-84,2:1 POLISH 826-77470 $899.00

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