Thank you sir!

How did it turn out?

Devin Rock Thanks, I love it too! Tthe x-pipe will only make it louder under acceleration, so your best bet to make it a bit louder but quiet most of the time. Keep the resonator in case you ever want to go back to stock and sell the car. X-pipe install was $50. I did the switch myself, cutouts were $120 installed

Letran not many people want to mess with stock Mercedes. Everything is a pretty penny unless you're well off. And if you are, they go for the proper models, not Cs or MLS.

Thxs, Very few aftermarket performance mods exist for these cars because the consumers who buy them just don't care (and the C63 is available for those who do). The only performance mods I've made are K&N air filters, and an ECU tune. The car is dead slow and the mods didn't make much of a difference in power but the tune did remove a lot of the throttle lag, so I definitely recommend it. They also have Kleemann headers (on Ebay you can find the cheap Chinese knockoffs by OBX for under $400) but I don't recommend spending too much on this model as most people agree it can't even reach C350 levels at best.

Where did you find your ECU tune? The ones I found are gas saver tunes and honestly, they didn't seem too legit. I'm real interested in getting rid of that throttle lag.

The ECU tune added about 5 -10hp (I can tell since now I can chirp tires whereas before I couldn't), and about 65% of the lag is gone. Car responds more quickly, downshifts faster, and keeps the gear longer when playing around. I got mine from oetuning.com/ I live in SoCal and they are located in HB, close to where I work. Their tune is legit and I can vouch for it. The next best option is going with Kleemann as it's a better tune from what I hear, but you go for $400 to $1700 for a tune, not worth it for a few more HP, at least for me.

That makes perfect sense... no point in spending that kind of money for the little gains. Thanks for the info sir, I appreciate it.

Marius Dornean hey man i got a question if i buy the magnaflow x pipe do they come with the long metal pipe that connect to the xpipe or they shop gonna provide it? and how much is cost u to install that

Any muffler shop. You don't need to change the exhaust tip, just the cutouts, for more sound.

Marius Dornean thx for the information

A bit of drone but with the cutouts I can turn them off and drone goes away. A bit of gurgling when cold upon start, but nothing proper (I had a viper and had a few backfires when downshifting that were so loud I thought I blew the tranny!)

+Marius Dornean cool, thanks

2.25" if I recall correctly

Before the forward cats would be problematic due to limited space and potential heat issue (exhaust coming right up under the tranny). I think it would definitely make it louder, but moving the oxygen sensor and cats may not be worth the extra work.

+Marius Dornean Thanks I think I will put my cutouts after the o2 sensors witch are after the cats. It should not throw codes if the cut outs are after the cats. I hope it sounds good! Thanks for the advice!

2.25", link to exact part: www.amazon.com/gp/product/B000XQO0VG/

Yes.

Yes, absolutely.

The x-pipe reverberates the two engine banks causing a nicer tone, straight pipes, h-pipes, and x-pipes all have distinct tones.

***** X pipes provide more higher RPM HP at the cost of lower torque while h pipe does the inverse, both relative to straight pipes.

***** the 'nicer' tone is my opinion only, some people prefer the 'pulse' of a true dual, other love the 'thunder' of an H, I just like the 'roar' of an X pipe more.

***** You can hear the 'pulse' I was talking about here: kzfaq.info/get/bejne/eMichKmC2bS7eqc.html while you can hear the 'roar' of mine with x-pipe here: kzfaq.info/get/bejne/bLpzl9l_mpPJo6M.htmlm48s I know it's hard to tell in both vids, but trust me it's something you can notice.

+ERIC ROUBLICK The lights are unrelated. You can take it to a reputable shop who deals with Mercedes to be safe.

Chris Fahmy no smell whatsoever.

is your cutout right after the Cats? as in approximately right under the gear shifter?

Chris Fahmy no, right before the diff, after where the resonator used to be and the X pipe was installed.

oh okay so maybe thats why you don't smell it. its a little farther back then i would've done it. i appreciate the response!

The shop said putting them up front was not recommended due to clearance and heat.

No

@@LoudFiat ok thank you

Stock mufflers.

+Marius Dornean ok thanks

No drone at all with just the xpipe,

It really does make the car sound fantastic, how does the dealership feel about it in terms of warranty?

I've read that since it's cat back, unless they can prove the modification caused the issue, you should be ok

Yeah, you'll have a hell of a time figuring out how to get the pipes to reach the side skirts given lack of clearance. The closer you are to the engine, the hotter the exhaust. You would not want just downpipes right under the cabin if you are close to the cats - you'd probably start a fire! I explored the option with my techs as well; given the clearance it just wasn't practical. Let me know if you go that route and figure it out.

what you mean? i meant im removing my resonator like you but ive seen some xpipes after cats rather than back by mufflers like you. im not doing cutouts just resonator delete with xpipes and most told me to put it after cats for performance but towards mufflers for loudness

I thought you meant the cutouts; either way the cats are in the front of the car. This car is slow as shit, even with a tune and the x-pipe, I doubt you'll feel a difference. All of this is really for better sound, if you want performance get a car made for power, not a dog like the C class (unless you're talking the C63).

so you think there is a sound difference if i put xpipe where you put yours compared to putting it behind cats? or no difference

I doubt there will be much of a difference. If you manage to get cutouts up there, it would scream.

Timmy Zirkle just buy good ones. I had to take these off after I replaced them three times.

@@LoudFiat what went wrong you think? Just electronics? Or too hot??

@@explorinlearnindoing5462 too hot + cheap Chinese versions.

@@LoudFiat okay thanks!

Overall the car is a snail. It did help a bit, but it wont make a 220hp car a 600hp car :p

Marius Dornean ECU tune and power commander will make it a lot faster

eigdf I already had the tune performed on it.

Marius Dornean how much horsepower and torque did you gain? and how much was it if you don't mind me asking

eigdf $300 tune. HP/tq - dunno exact numbers. these engines are just slow as hell and I'd be surprised if I got 20 hp more. the biggest difference is the transmission reacts faster. the stock tune drove me nuts with the delay in downshifting

I sold this slow car; went electric and will never go back to flinstone mobiles.

Your local Benz tuner.

+TheNoobComment Bad mic on my phone, DB level is significantly higher on open.

How much does it cost?

Cutouts $75 each, x-pipe $99, installation varies based on your shop.

Thanks Marius !

Marius Dornean You must buy them in bulk, or you're getting the cheap ones that break after a month - because just about every cutout I find is no less than $430 for a set of 2, and that's not including the turndown pipe that angles it down off the cutout.

Crank Turner​ I got them off eBay right around Christmas for half what they go for. But yes, they are cheaper Chinese make, not the proper USA ones (makes no difference to me)

Marius Dornean Gotcha, awesome. So the ones you got work well? Have they been installed very long? Would be awesome to get the details on those - reliability, auction title, seller name on ebay, etc. Thanks!

The C300 is as quiet as you can get stock.

Route of least resistance huh

It's for loud noise only.