Getting Quad Exhaust Done On My C32 Monday - ADVICE PLEASE
so i got my hands on a nice shiney set of 4 amg tailpipes from a C55.
i have just fitted a carbon rear diffuser.
i want the car to sound good but not loud.
so this is what options im thinking....
1. get custom tail box made with exit pipe going behind bumper to other side and keep the rest of the system standard.
2. same as above but get resonator delete aswell.
3. keep resonator but do away with rear silencer and just have 2 pipes running right to back without any silencer.
4. go for full twin pipes from seconday cats right to back with a x-pipe.
im honestly thinking number 1 or 2 as i dont want it noisy or droaning as i like to go for decent journeys with wife and kids at weekends etc...i just want a nice burble on idle and a good rip on full throttle
This is the design of the rear silencer that im thinking of:


another question..... do i keep the twin tailpipes level with eachother or do i have the inside tailpipe sticking out slightly more to go with the shape of the diffuser like this:

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If you are on a budget then leave it as is. If you have money to spend on it then do it properly. Start from in front of the diff. Split it into 2 pipes, 2.25 or 2.5", definitely have some sort of muffler in there so it doesn't drone, bark or just annoy you on long journeys, leave the cats, you can remove them later on if you want more noise. Loud exhausts get old quick especially when you daily drive the car.
Just my opinion, do what is right for you.
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If you are on a budget then leave it as is. If you have money to spend on it then do it properly. Start from in front of the diff. Split it into 2 pipes, 2.25 or 2.5", definitely have some sort of muffler in there so it doesn't drone, bark or just annoy you on long journeys, leave the cats, you can remove them later on if you want more noise. Loud exhausts get old quick especially when you daily drive the car.
Just my opinion, do what is right for you.
I've got 4 mint C55 tailpipes and a carbon fibre diffuser ready to fit.
I was just thinking while my car is at the custom exhaust shop I might aswell get the car sounding nice.
I really don't want to make it too noisy or sound raspy.
This is why I was thinking just do the rear silencer with quad pipes.
But it would be easy for the guy to do a resonator delete at the same time.
Im not doing it for performance reasons...My car is quick enuff for me and also have a s/c pulley and tune on its way so Im not bothered if I loose a horse power or 2.
Just because a well respected company does it, that doesn't mean it is a great idea. You can't honestly tell me you think that routing half the exhaust through extra bends and another 4ft of pipe is somehow going to be beneficial vs stock?
I will be honest in saying I do not know how the stock muffler is set up. Some of them have two exits that exit from the same chamber. In that case 90% of the exhaust will go out the tip on that side of the car. The extra back pressure from the other half which has to travel to the other side of the car is going to reduce flow to that side. This might even take away from performance since you have added restriction to half your exhaust flow. Will this be measureable? probably not. I would prefer fake tips than do this, cheaper too.
A proper exhaust does not have to be outrageously expensive. Can I afford to have one made? no I can't but if I were to do it, I would get headers followed by 2 stainless 2.25" pipes, no cats, one high quality resonator on each side and one high flow but non-straight through design muffler on each side all with minimal bends and tig welded. I would expect minimal noise and maybe 20-30whp max.
Again I am just stating my opinion for the sake of a good discussion. No one needs to agree with me.
1.Replace secondary cats with straight pipes
2.Keep standard Resonator
3.run dual 2.75 or 2.5" pipes from resonator all the way back to tail pipes.
4.if too loud will fit 3" baffle pipe just before tail pipes.
This should flow much better than one rear silencer with pipe running along behind rear bumper.
Going to try it anyway.
What do you think??
1.Replace secondary cats with straight pipes
2.Keep standard Resonator
3.run dual 2.75 or 2.5" pipes from resonator all the way back to tail pipes.
4.if too loud will fit 3" baffle pipe just before tail pipes.
This should flow much better than one rear silencer with pipe running along behind rear bumper.
Going to try it anyway.
What do you think??
How much this gonna run you?







