[W126 Coupe] Headers Available
Tom&Dana
dwgriff at sbcglobal.net
Thu Dec 17 12:03:11 EST 2009
I have a set of new, never-mounted headers for sale, custom made for a 560
SEC. I have been a member of this list for a long time, and out of loyalty
to the list I am offering them here before posting them on eBay. I'm asking
$1400, which is about what they cost to make in 2003. For those of you who
don't know the story, here it is.
Another member of this list supercharged his car back in 2003. I don't want
to post his name without his permission, but he was quite the celebrity on
this list and others as well. Like the rest of us, he was horrified by the
restrictive stock exhaust set-up. He found a machinist to build and
custom-fit headers for his car, and made several additional sets. They are
made of 16-gauge mild steel, 1-3/4 inch diameter, and ceramic coated in
silver. The coating is by Jet-Hot, and is warranted for life. They are a
true Tri-Y configuration. The pipe diameter was optimized for laminar flow
over the entire velocity range.
The primary benefit is a big reduction in back pressure. The stock set-up
results in lower power, premature valve-stem failure and the notorious head
gasket leak at the number 8 cylinder. The Jet-Hot coating will prevent any
rust whatsoever and will result in lower under-hood temperatures, too. I
have used it on other cars and have been very impressed.
So what's the power difference? Our esteemed member dyno'd his supercharged
car both before and after replacing the stock manifold with the headers.
Rear wheel horsepower increased from 306.6 to 345.6, and torque increased
from 372.6 to 397.7. That's huge, and it illustrates just how restrictive
our stock exhaust really is. I cannot guarantee what these headers will do
for a non-supercharged car, but I would expect power gains to be
similar--somewhere in the 10% range. Remember that a stock 560 SEC (US)
only puts out 238 hp at the flywheel, so it needs all the help it can get.
So why am I selling them? It's simple. I live in a smog-regulated place,
and these headers don't have an EGR port. I would have to detach the EGR,
and that's a no-no here.
Here are a couple of photos:
http://www.flickr.com/photos/dwgriff/4192351711/
http://www.flickr.com/photos/dwgriff/4192351625/
If you're interested, please email me offline at dwgriff at sbcglobal.net
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