Removing 'center' silencer (resonator)

[pharmed]

On a 230 kompressor...

I'm talking about the box between catalyst and the backbox. Removing this and getting it replaced with a straight through pipe..

Will it negatively affect performance? I'm guessing it will give it a gruntier sound..

 

[m2287]

do it! It will sound better, if anything it would improve performance, allowing gasses to leave the exhaust quicker

 

[pharmed]

Won't run risk of making it more 'free-flowing' or losing torque etc?

Also - Rough idea of the price I should be paying?

 

[m2287]

Loads of people on here have done it, I did it to my CL55 AMG (but also took the secondary cats out at the same time) The only other performance mod ive done is K&N air filters and Mine now does 0-60 in 4.9 secs (standard is 5.6).

 

[BTB 500]

I paid about £130 to have it done on my SL. That was a more complex job as the pipe had to be fabricated as a 'Y' shape, but it was about 5 years ago. So probably a reasonable ballpark figure for you.

 

[m2287]

Sorry I paid £220 for mine last year!

 

[pharmed]

Thanks guys, I'll update if done!

 

[Shude]

Won't run risk of making it more 'free-flowing' or losing torque etc?

It will be more "free flowing" as the resonator baffles the air around to knock the noise and some of the speed out of it. Don't worry about losing torque, removing restrictions won't do this and especially not to a forced-induction engine.

 

[BTB 500]

Sorry I paid £220 for mine last year!

But presumably a more complex job than would be required for a 4-cyl 230k with a single pipe exhaust system.

 

[m2287]

Yea way more, 2 pipes instead of one and with an x weld.. At a guess I would say £100 for a single pipe

 

[Will]

Worth considering the recent MOT changes when looking into exhaust mods?

Not saying that this would fail, but I'd want to check

Will

 

[BTB 500]

MOT would only be an issue if it made it unacceptably noisy (very unlikely). The new regs. only relate to missing cat(s):

http://www.dft.gov.uk/vosa/repository/technical pen picture 4.pdf

You do need to declare it to your insurer as a modified exhaust though.

 

[Palmer]

Dooo it

 

[pharmed]

Insurance is not an issue, I'm with a company that allows most modifications free of charge on my policy

 

[BTB 500]

Mine didn't charge anthing extra, but you still have to remember to declare it

 

[m2287]

And the result....

CL55 AMG exhaust - YouTube

 

[pharmed]

Did mine today, sounds better but still needs the manifold fixed!