sikhkd

First I had cut 158, not enough... then the 159 and then I was able to tell a difference- sounds great, no drone and no check engine light unless you mess around with the cats

Broker

I absolutely love the sound of the stock 63 engine, and is exactly what I would like my SL55 to sound like. Can anyone compare the sound of cutting off 158 and 159 compared to a stock 63 engine?

And when you guys say you remove these pieces, do you have to replace it with something?

Viet_Amg408

if you cut out 159 and 158..your car should sound alot better.

CristianTena

I have 159s removed, sounds great.

cal1

I am just seeing your post so if you already got your answer then disregard please. the short answer to your question is yes. depending on what you remove like in cristian's post regarding the res delete (#159).

I removed the secondary cats (#158) and welded in a piece of 3" stainless steel "U" bend. If you look at the diagram carefully, you can see how the "U" bend can be cut nearly in half (slightly off center) to link in where the secondaries were. I had a local muffler shop do it for me. No CELs with the secondaries removed.

By the way, nothing you do to the 55k exhaust system will make it sound like an NA 6.3 motor IMHO.

iAMGod

158, 159 removed - sounds great - not to obscenely loud but sounds boss at WOT.

cal1

^^^ No drone at cruising speeds? Some LTHs would be nice to finish out the exhaust modes.

iAMGod

When your used to a 430 with tubi and straight pipes......this is tame

I have officially banned myself from doing any more mods - going to move to the 65.

Have you got the LTH?

cal1

No... I went with EvoSport shorty ceramic coated back when there weren't tons of good LTH around and they had to be fitted, cut, welded and maybe CEL issues so on and so forth. The shortys bolted on and work good, but if I had it to do over again, LTH would have been the way to go.

I'll bet that 430 sounded angry!!!

iAMGod

I see - sounds like significant amount of work - but your car sounds very nice.

Yes angry is a good way of describing it....check out the clips in the sig you will see

Stevant

Bruce at TTM had done work on another SL55 which I heard and it sounded AWESOME! He is finishing mine up tomorrow. He suggested headers which includes removing the primary cats (157), stepped up the pipe to 3" into an X pipe (which replaces b) , removed the secondary cats (158) and ran the 3" pipe to the resonators (159). Decided to keep the resonators to elliminate any droning. The system sounds fantastic when you get on it and just right when your taking the wife to dinner. If you can get to see Bruce, I highly recommend it, great job and the welding is second to none. I'm sure he is going to get some pictures up on the thread.

cal1

I just checked out the vids. Pretty "F" ing awesome. Truly exotic sounding to me with a bit of anger to boot.

iAMGod

You have good taste my friend.

kamilclk430

Here is 158 and 159 cut out from the original exhaust I will try to get a better video tonight from a parking garage

kamilclk430

if the video above does not work here is a link to the youtube vid http://youtu.be/D1h5GNxlNDw

ForceFedSL

I just had my 158's removed yesterday and replaced with straight pipes, honestly I felt bad cutting out an AMG part but with the removal of those secodary cats it gave the car a deeper growl on WOT. As for start up, idiling and cruising there is no major difference unless you really know the sound of the car and pay close attetion. So far I am very pleased with the sound but did not feel any performance gain or loss as of yet....

iAMGod

Your plate.....

LukasBMW

Has anyone been brave enough to cut off 158, 159 AND 160?

What about 159 and 160?

I really like the stock SL55 tone as it is...but seeing this video makes me think about exhaust mods:

http://www.youtube.com/user/lamb2u#p/a/u/1/wd3Tfq2JlG0

OUTCAST

That sounds mean as hell!

kamilclk430

Thank You I love it as well

cal1

I would be afraid of a muffler delete as well as secondaries and res would make the car sound like the next door neighbor kids Mustang GT. The beauty (at least to me) of the more subtle exhaust deletes is you get a close to stock sound at idle and low throttle, but at WOT she announces that she truly is a beast.

By the way, the link is of my SL. The sound is the result of shorty headers (evoSport) and a secondary kitty delete (158). I think the SC whine is thanks to the 180 counter pulley.

kamilclk430

COLD START VIDEO

http://youtu.be/q5ZhtHXW_IA

Brent72

It just sounds so mean with that deep growl. Can't wait to get the secondary cats removed from mine. Any more videos to share?

kamilclk430

Thanks

Yea I will take another video in a parking garage so it will give more sound off.

Brent72

Great. I'm looking forward to hearing that one.