$975. Look great, really nice shine. 304 Stainless and TIG welded. All welds are sound and no issues at all. Cats are from Kleeman and made for these headers so fit and finish is flawless. Oxygen Sensor bungs are already in place. Sound incredible and great power. Will pass emissions and no engine codes are thrown even with the stock tune. Much cheaper than longtubes but almost the same gains.

Gaskets are included but I suggest you still replace them with new OEM at $25 for good measure. Header nuts are not included either as those are one time use and only $16 for OEM.

Did you ever dyno with the headers on? And if you did dyno, what tune were u running?

I was running the Kleeman tune that came with the headers, K2 package. I never had it dyno'd but it certainly felt like it took advantage of the extra exhaust flow. I also ran them with the stock tune with (but I have the P31 package), so my stock tune isn't all that much different than the Kleeman tune. Either way the ole butt dyno definitely felt some improvement. IIRC there are many threads on it that say about 570 at the crank with the Kleeman K2 package, and I wouldn't be surprised if it was around 460 at the tire.

Bump.

If they are still available and if you can comfirm that they fit a 2012 E550 Cabrio, please PM me your contact info.

? Why would it fit an E-class that doesn't even have the M156 6.3L engine? The C63 is a W204 class...with a big engine. Two totally different things, unless I am missing something.

A simple "no" would've sufficed. I obviously didn't know/notice what kind of car this came from. BTW: This E class has a M278 4.7L, Bi-Turbo engine! Thank you.

Ok I'm sorry. So no.

Those cats look like they are still new because they should be welded onto the stock pipes. Did you already have them cut off? Also, a non-P31 tune will throw a "CAT Efficiency" code.

Very interesting on the tune. I have P31 and before it had the Kleeman tune there was no code thrown. I wonder why the non-P31 would throw a code? In stock form both use the same cats from the factory so I don't know why they would turn that detection off for the P31 since it would still have to meet the same emissions standards.

Yes they were cut right at the weld where they met the factory pipes and cleaned back up, so they will line up and install like new.

I had to run the stock tune for a bit due to an issue I had with a particular version of the K2 tune I had and Cory advised me that in less than 100 miles I will get the CEL and it did happen.

GLWS.....they look like they were hardly used since you have hardly any discoloration from heat.

Sold.