Here is a website that has all the stuff you need to either DYI or have it installed. It is not an easy job to put one on, very teadious. They have instructions available.

www.worlduph.com

Quality stuff very close to original MFG

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I really gets fun when they all don't run

84 500SL
99 Jeep XJ
93 Jeep YJ
03 Custom Softail