I just put two of these in my 380SL after an "unfortunate incident". It's too bad that they aren't available for the 5.6 117. Seems that there would be a market for it. It could be machined from aluminum by an enterprising person...

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86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm