Join Date: Aug 2011
Location: Charleston, SC
Vehicle: 2009 SLK 350
Other Toys: CLA 250
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Finally got the time to work on Black Betty. Installed the headers and down pipes/CATs. The passenger side exhaust is done.
All that is left is finishing the driver's side exhaust tomorrow.
Anyone thinking of doing this yourself on a 350 be aware. You better have skinny arms. Removing the old manifolds were more difficult than installing the headers. The second bottom third nut from the back is a bear. It's directly behind the 2nd exhaust pipe and you can't get a socket on it. I had to use a combination wrench. Another thing is the driver's side heat shields. There are two SHARP bolts sticking out that will tear your arms up. Mine look like I've been in a bad car wreck. I finally figured out that putting several layers of duct tape over them makes it a lot easier. At least, after this, putting the new headers were a breeze. Also, be smart and get you a pair of thin gloves and cut the fingers off. This will save you a lot of pain from the repetitive motion of the ratchet wrench and your hands against the heat shields.
Now I just need to finish up and check for manifold leaks. I pray there are none, remember the bottom nut?
It's good to be retired and not be rushed through a job like this. Actually quite fun. Black Betty seemed to like the attention.
I'll update after finishing up and leak checking everything.
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Terry, Retired U.S. Navy Master Chief