Debating on headers? Thoughts? Also, possible Kleemann headers group buy?
I am thinking to possibly pick up a C63 in the next year or two and sell the E55, but thinking if I get headers, that'll change my mind

Can the headers guys please chime in and let me know your thoughts?
Also, I wanted to email Cory and see if he could maybe discount the price a few hundred more if we can get maybe, 10 people for their headers?
IMHO, headers should be the # 1 mod every E55 owner does to their car.
Having said that, I am debating whether I really need more power (I am quite satisfied and have been for several months now), but the headers do help quite a bit for cooling purposes, which is my main focus right now with the vehicle. If I can have consistent power without huge drops because of heat, I am more than happy with the power and acceleration as she sits.
With summer right around the corner, I am already dreading the 100* humid days when the car feels like a slug.
Side Note: The Kleemann headers are a bargain at their current price ($995 I believe), so getting Cory to come down might be hassle. Most other headers on the market are $2K +.




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You see where it is made (possibly china?). It looks like the weld marks inside are rusted already. Its pretty edgy in there anyway with different pipe and join diameters, etc.
And the design of 2pipes into one anyway is not as good as the first design, where all pipes were similar length and joining one collector together.
Also around the ports at the flange to the head, it has some large obstructions because of mis-welding and the with 4 little weldspots pinned Kleemann sign looks just extremely cheap and made by a 5 year old.
The very long downpipes aren't any better either, especially the point were you connect them to the holder behind the gearbox, terrible fitment and welded at a wrong angle.
But the price was such a bargain IMHO that i bought them anyway and will try to fit them the upcomming months.
Some picture are here showing the obstructions at the ports: https://mbworld.org/forums/5891771-post123.html
Tell me what you think? I can do more photos if you like. Shoudl is end them back to Kleemann and ask for a refund or better finished ones?




These are however the best looking headers I have seen. The quality of the welds is unbelievable. They are steeply priced though.
IMHO, headers should be the # 1 mod every E55 owner does to their car.
Having said that, I am debating whether I really need more power (I am quite satisfied and have been for several months now), but the headers do help quite a bit for cooling purposes, which is my main focus right now with the vehicle. If I can have consistent power without huge drops because of heat, I am more than happy with the power and acceleration as she sits.
With summer right around the corner, I am already dreading the 100* humid days when the car feels like a slug.
Side Note: The Kleemann headers are a bargain at their current price ($995 I believe), so getting Cory to come down might be hassle. Most other headers on the market are $2K +.
not sure if there is some type of crush collar that can be placed in between the header/collector to seal it up?
as many have stated - normal driving sounds damn near stock, I have my resonator removed so it's a little more sound but in general, I don't think my wife will notice much - until she gets on the pedal

I just need to get the 'pfffft' sound cleared up from those leaks first! haven't gone WOT yet

While I haven't experience a full WOT run yet, the power and torque is increased - pretty noticeable by how much less pedal is needed to do just about anything, from cruising, to a quick pass.
the S/C sounds like it is working more efficiently as well (if that can be audibly detected)

once I get it buttoned up I'm sure it will be amazing

maybe some type of gasket like this? I don't remember any gaskets in the header kit though...
Last edited by Toadster; Mar 20, 2014 at 03:50 PM.
I would ask for a few more opinions before targeting your gaskets because in my experience failed gaskets make a 'ticking' noise that increases in frequency with the rpm's?
You could just skip all the nonsense with those 3-hole style flanges which always seem to work loose, blow out gaskets, leak, etc. and just transition to a quality v-band setup now.
It's a bit more labor to weld on the rings, but the final effect should be 100% leak-free and virtually bulletproof for the life of the car.
-G




If you just want to seal the gasket you have just use some Permatex Ultra gasket to seal off.







That was on a Mustang too.. They really do help with cooling as well.. Go for it, you won't regret it..
LOL