Removing silencers from SL55 exhaust....

[cfoster]

I'd like to improve the noise coming out of the back of my SL55 and have been advised the best mod for one of these is to remove the resonators/secondary cat etc.... However I am a little confused as to which ones should be taken out.

I am right in thinking it is 158 and 159 from the diagram below, leaving the rear boxes still in place? I don't want it completely in your face boy racer loud, would just be nice to hear the V8 rumble a little clearer!

Cheers

 

[daveenty]

As far as I can remember then yes, 158 and 159 would be removed, usually with the addition of an X pipe (similar but wider to b in your drawing) somewhere between them to balance the system.

I know that a member on here (AMGeed) had his E55 done like this, and was very happy with the results. OK it's a slightly different system, but more or less the same components.

I would personally recommend MSL Performance for this mod, they have an in-house fabricator and will also advise the best way of doing it.

 

[cfoster]

Great thank you, I am fortunate enough to have Pipecraft and Haywood and Scott within stones throw of my house so will use one of these companies.

Thanks
Chris

 

[AMGeed]

Hiya Chris,

As Dave above posted, I had the secondary cats and resonator removed (158 &159) from my E55 and replaced with a x-pipe for balancing.
The result was just what I wanted. Not intrusive or any drone, but when opening the throttle a real V8 burble.
A couple of photos of the work done-

 

[cfoster]

That's exactly the noise I want, not over the top but loud enough with the taps open. I had a Milltek fitted to my Audi S5 and the result was very similar!

How much did you pay for the work to be done (pm if you wish?). I've got it booked in for inspection at Pipecraft tomorrow and Haywood and Scott on Friday, just want to make sure i'm not being ripped off!!

Cheers
Chris

 

[AMGeed]

That's exactly the noise I want, not over the top but loud enough with the taps open. I had a Milltek fitted to my Audi S5 and the result was very similar!

How much did you pay for the work to be done (pm if you wish?). I've got it booked in for inspection at Pipecraft tomorrow and Haywood and Scott on Friday, just want to make sure i'm not being ripped off!!

Cheers
Chris

PM sent.

 

[ghn27]

Had the secondary cats and resonators removed on my SL55 and very happy with the improved exhaust note.

This is a short vid after exhaust was done

https://www.facebook.com/photo.php?v=765834330108150

 

[cfoster]

Sounds good mate, I popped down to Pipecraft yesterday (very reputable exhaust place in the area) and they are happy to remove the pipes but he did say that the X over pipe is not required? I am aware it is to split the gases out the back but what other reason is it required?

Thanks

 

[whitenemesis]

X-over is used to help evacuate the exhaust gases by using the pulse from one bank to pull them from the other. This improves torque and balances the sound

Have a read here

http://www.performance928.com/cgi-bin/page_display.cgi?page_nav_name=exhaustuPp&pass_parent=1128

 

[Essel]

I think mine has a "simple" back-box delete, though I'm not sure

It sounds unreal. Good luck in your quest!

 

[AMGeed]

Sounds good mate, I popped down to Pipecraft yesterday (very reputable exhaust place in the area) and they are happy to remove the pipes but he did say that the X over pipe is not required? I am aware it is to split the gases out the back but what other reason is it required?

Thanks

Insist on it Chris. It is necessary as Whitenemesis explained.

 

[joe2612]

If anyone still has their resonators after doing this mod please PM me as I'm trying to source some. Thanks!

 

[Larkone]

If anyone still has their resonators after doing this mod please PM me as I'm trying to source some. Thanks!

Last post was over 8 years ago