Point2Point

Is the E55 with resonator delete as loud as a stock SL55? I think the stock E55 exhaust set up is not vocal enough.

efivefiveamg

I have only deleted resonator and put in straight pipes (otherwise, all stock) and the difference is barely noticable, if at all. Not sure how it compares to SL55, tho.

rluvsbenz

Did you gain any horses?

guysandiego

I put in a X-pipe ... the difference is vey small. I have no idea how it compares to the SL -- It sounds a tad deeper but not loud -- I can hear the difference when i start the car... More noise when you get on it but very hard to hear from the inside of your car even with the windows down -- because the wind.
HP gain probably 1hp: meaning you will not feel it -- maybe smoother at high speeds but you will never feel it on a 500hp car. Might save a little gas too.

ATKM5

Here is my former E55 with Resonator and Secondary Cat delete and X-Pipe...
Hope this helps a bit...
http://www.youtube.com/watch?v=x4Xp6GmWj8g

http://www.youtube.com/watch?v=vrVG43tAlsw

http://www.youtube.com/watch?v=69BmDEHHBr4

TopGun32

X pipe is definitely the way to go instead of resonator.

I believe you can X pipe the 2nd cats too..

Anybody know if we can use generic X pipes compared to buying one for $300 from our vendors?

Bellevue_E55

Awesome thanks for this. I did the xpipe -- $60 magnaflow and it barely made any sound difference and I have been wanting to get an answer re sound with secondary cats gone.

The cat removal definitely makes more noise. Thats my next step!

Here is my car on dyno with just x pipe
http://www.youtube.com/watch?v=CKRB4MbOmOU

ATKM5

I used a Magnaflow x-pipe as well! Definitely remove the secondary car if you want a little more sound....

ATKM5

Yup! I used a generic Magnaflow x-pipe that is also used on Mustangs and Vettes.

VENOMNS

Let me know if you guys need a Magnaflow Xpipe... I bought one and never installed it. I have an E63 and just went with straight pipes!!

ATKM5

Now THATS the way to go!

Ohbev

If i delete the front cats and second cats keep the stock H pipe and stock res will i make more power since i have no cats's what will be the good and bad points to this

bigswin

I deleted the secondary cats and resonator and ran straight pipes (no x) and it has some growl at idle and is pretty aggressive at WOT. Inside the cab is still quiet tho.

I wouldn't recommend deleted the primary cats. If anything you could replace them with Hi-flow cats.

jpohl402

If you remove Primary Cats, you will have a Check Engine Light

ATKM5

But you could gain 15 rwhp if you remove the primaries and tune for them! Plus the tune can remove the check engine light!

Nait Sirhc

What is the link to the X-Pipe you guys are buying? From Jegs or Summit?

TopGun32

ditto on the request.

I think we need a 2.75" X pipe.

Vader55

+1 I like straight pipes on the E55, the x-pipe sounds good on the E63 though.