deef

Hello guys, I just bought for my CLS500 AMG mufflers. I didn't install them yet. but I want to ask if any one know how to make the sound louder? I think there is something I can remove it so the sound comes louder but I don't know what to remove exactly? Any one know?

UKSilverArrow

If the CLS back box is anything like the AMG 55 then there's not a whole lot you can do to it as it's effectively a straight through set up.

The SL500 has a very restrictive merge pipe just behind the 2 main cats, this thing is pinched together reducing each pipe to around a 1/2" and merges the gas flow taking away the uneven V8 rumble.
When I changed to an AMG system I cut this section out and replaced with individual 2.5" pipes.
It's not overly loud but the rumble is great and flows much more freely.
David

Television

I did not realize that it went that smaller I must follow Ebay more closely

UKSilverArrow

Here you go TV, excuse the butchery



You can just make out the internal merge in the second pic.
David

lovemysl

Did you remove the merge and replace with 3 inch pipes and lost no back pressure?

UKSilverArrow

Replaced with 2.5" pipes. Can't say if there's any loss in back pressure, but still got all the cats in which offer a fair bit of restriction. It feels pretty lively all through the rev range, so if I did lose anything I doubt it's very much.

It's all very unscientific but I have a stretch of road between 2 roundabouts (don't think you guys have them) where I can measure gains/loses from my ham fisted efforts. The upshot is 10mph quicker over the same stretch so I guess I'm a regular genius (or just got lucky which is more likely).
David