[kov68]

I removed the catalytic converter from my exhaust!!
It was a tough task (about 2 hours), but the sound is deeper and louder with a nice rumble on deceleration!!

The cat is right after the O2 sensor inside the inlet of the muffler before the baffles.
I started by carefully drilling holes (not too deep as to damage the baffles or pipe) with a 10"Long 3/8" Drill Bit,
Then I used a long prybar and screwdrivers to chisel out the cat material.

The cat is actually inside a metal sleeve that is welded inside the muffler inlet, so prying, chiseling and scraping will not damage
the exterior of the exhaust pipe so as long as you stay inside this sleeve (which is about 3"-4" deep)

This is not a mod for states that require annual vehicle emission testing.
As for voiding the warranty this will for sure, but I will not be telling my dealer I did this, or will they be able to tell. ;D

Here is a pic of before

Here is a pic of after

 

[dejablu110]

I don't think you have to worry about warranty issues....unless the problem
you need fixed is the exhaust itself. Then just go with an aftermarket. We do
all sorts of mods and haven't had any problems with warranty work.

 

[11Stryker]

That is a Super Cool Mod. Have you had any adverse or negatives about it after you have ridden it for awhile to check it out?

 

[RedStar Raider]

That is a Super Cool Mod. Have you had any adverse or negatives about it after you have ridden it for awhile to check it out?

Only if you consider a louder V-twin rumble a negative! ;D


RSR

 

[11Stryker]

That is a Super Cool Mod. Have you had any adverse or negatives about it after you have ridden it for awhile to check it out?

Only if you consider a louder V-twin rumble a negative! ;D


RSR

I was thinking more on the lines of Flat spots in throttle. But I guess with Fuel Injection, not as likely to happen.

 

[kov68]

Nope, no adverse effects.
Just alot better sound - Not harsh like drilling the baffles

 

[11Stryker]

Great, I think I am going to do this also this weekend. Thanks for the reply and I'll let you know how I make out.

 

[kov68]

Some advise...
Wrap the outside of the muffler in a towel or blanket, so it will not get scratched up.

Get someone to help you out doing this, because you will not be able to hold the muffler while drilling or chiseling,
or see inside of the muffler without a flashlight or spotlight

Also...Continually shake out the loose bits through the inlet (try not to let the bits get into the baffles).
Wear a dust mask
Rob.

 

[RedStar Raider]

WTG Kov! it's this type of sharing of info that makes these bike forums so cool. I used to subscribe to 3 bike magazines a few years ago, but not anymore, I get so much more being part of the Raider forum, where i don't have to look at stupid harleys pix on every other page! I've been part of the Raider forum since 2009, where they only talk about the bike i own and love. This forum will go down that same road with active members sharing ideas, mods, info, and friendship. You few members that are active, stay active and promote the forum anytime you get the oppurtunity, you will go on and be known as a founding member. Check out roadstarraider.com sometime and see what this forum will become. Here's an interesting fact: 75% of all harleys made are still on the road today, the rest of them made it home!! ;D ;D ;D


RSR

 

[11Stryker]

Nope, no adverse effects.
Just alot better sound - Not harsh like drilling the baffles

Hey, I got my cat material removed this morning. It does sound better, but I have a tinny rattle on deceleration just running in shop- haven't taken out on road yet. Yes, I did get all material out and even used remote probe camera at shop to look up inside baffles and around 3" pipe that held Cat material. The sound is coming out the rear tips, not inside muffler. Do you have the same noise and also did you also drill rear of muffler out as in other post? I did not drill 4 holes yet at rear of pipes yet. Thanks again for this mod posting. I would never had thought about it!!

 

[kov68]

Nope, no tinny sound from my exhaust on decel.

I did also blow compressed air through the outlet before putting it on the bike to make sure there was no pieces left in there.
When I was cleaning up the exhaust before putting it back on, a tiny piece still came out of the inlet. ???

The tinny sound may be from the huge difference in air flow, but that is a good thing!! 8)

 

[11Stryker]

Ok, I used air also do blow it out and shook up and down while holding outlet down and got alot of small pieces out. I am wondering now if a heat shield is loose after all the chiseling. I will have to check it out tomorrow. Thanks again for the detailed help. Take care.

 

[dejablu110]

I know that aftermarket pipes have a bit of a rattling on decel, but its usually normal.
I'm guessing its hard to tell what exactly you are describing, without being there.

 

[11Stryker]

I know that aftermarket pipes have a bit of a rattling on decel, but its usually normal.
I'm guessing its hard to tell what exactly you are describing, without being there.

Yes, Probably nothing to worry about. I'll Have to wait for a little better weather to actually ride it and see how it sounds. Thanks.

 

[dejablu110]

get down on it some......maybe it'll blow out any leftovers ;D

 

[RedStar Raider]

I personally like the rumble of a nice v-twin on decel.

 

[11Stryker]

get down on it some......maybe it'll blow out any leftovers ;D

Got bike out today and all is good!! Sounds Great on road with no tinny decel.

 

[dejablu110]

cool deal

 

[RedStar Raider]

get down on it some......maybe it'll blow out any leftovers ;D

Got bike out today and all is good!! Sounds Great on road with no tinny decel.

That's cool bro!

RSR

 

[kov68]

Got bike out today and all is good!! Sounds Great on road with no tinny decel.

Glad to hear your happy with the sound, 'cause I've been happy with the extra DB's myself 8)

My 'bro can't do this type of Cat mod to his '11 VMAX, so he just bought a Vance & Hines system.