Several people have complained that their after market pipes are too loud.
This can be very annoying on long trips. Here is a cheap and easy modification for the DG HK baffles.

1. Go to Home Depot and buy 2 Danco Crumb Cups. Located in the sink repair department. Danco part #89049. The price at my Home Depot was $1.48 each. They appear to be stainless steel.

2. Remove the baffle set screw with a 3/16" Allen head wrench.

If the baffle has been in for a while, a squirt of WD-40 around the inner edge will assist with the removal.

3. Place the baffle in a vise.

4. The lip of the crumb cup needs to be ground so it will fit inside the baffle. Slowly turn on a grinder using a pair of pliers or welders gloves (it will get hot!)

5. Cut between holes on 4 sides of basket using a pair of dykes. Bend up and down where cuts were made.

6. Insert basket into baffle. Push down until the lip on the basket contacts the lip inside of the baffle. Tap lightly around the basket's outer edge with a screwdriver or drift and a hammer if necessary. The cut and bends on the 4 sides will hold the baffle in place. I also recommend taking a punch and lightly staking the basket around it's lip. 3 or 4 light stake points should assure a rattle free assembly.

NOTE: The crumb cup (basket) goes in the end coming from the header pipe.

7. Put baffle back in exhaust pipe. That may be the hardest part! Lining it back up takes practice!

Be sure to use some Loctite on the set screw when reinstalling. Be sure to wipe away any remaining WD-40.

The resulting sound will be somewhere between a stage 1 and stage 3 mod on the OEM pipes. This will result in a slight loss of power. You can continue to fine-tune the sound and performance by drilling out the center hole of the inserted cup (see below).

I personally did the additional mod pictured above on the right and am very happy with the volume and performance.

EDITOR NOTE: Mike also sent us this picture of an alternative suggested to him by Starman with the following note: "Alternatively, you could attempt the same mod without removing the baffles as pictured above.  Wedge the crumb cups into the back of the baffle and seal with a hi-temp silicone"  -Thanks Starman!

Questions should be asked in our forum (Use discuss link below). The forum is very active and you stand a good chance of getting your questions answered there. If you would like to leave feedback for the author, or have additional information you think will benefit others, please use the comment section at the bottom of this page.

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DISCLAIMER: This information and procedure is provided as a courtesy and is for informational purposes only.  Neither the publishers nor the authors accept any responsibility for the accuracy, applicability, or suitability of this procedure.  You assume all risks associated with the use of this information.  NEITHER THE PUBLISHERs NOR THE AUTHORs SHALL IN ANY EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, PUNITIVE, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OF ANY NATURE ARISING OUT OF OR IN ANY WAY CONNECTED WITH THE USE OR MISUSE OF THIS INFORMATION OR LACK OF INFORMATION.  Any type of modification or service work on your motorcycle should always be performed by a professional mechanic. If performed incorrectly, this procedure may endanger the safety of you and others on your motorcycle and possibly invalidate your manufacturer’s warranty.

Comments (10)

Almost too quiet now! Written by dseward, on 07-21-2008 05:21 Added the cups to my exhaust on Sunday. Wife likes it ALOT better. Cut out the center gives about a 5/8 center hole. Might try grinding it a bit bigger until I hit a compromise between the wifes ears and mine! Sorta miss the rumble but not the grumbling.

Whats is this "Too Loud" you speak of Written by Frankie_G, on 04-19-2008 16:43

Roadhouse slip-ons baffle mod. Written by Greysnake, on 05-18-2007 20:40 forgot one thing You don't have to grind the edges of the cups before putting them in the baffles.

Roadhouse slip-ons baffle mod. Written by Greysnake, on 05-18-2007 14:47 I did this mod on my Roadhouse slip-ons with a little  difference. I used the larger cup #88967 with the center  post. cut that out and followed the rest of the information here. Really worked great

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