What is the difference between the black and the yellow Koni struts?

About $800 a set. The black Konis are the factory units, and no longer come slotted. The yellow Konis are identical, slotted, and about 1/3 the price.

The yellow struts are, however, illegal for Showroom Stock club racing competition (they are legal in Stock autocross, though they may require a washer welded over the slots to remove adjustability). Note that the legal black units are now available through Mopar Performance; they carry a different part number and are for some reason considerably less expensive. Below are part numbers for each type (part numbers courtesy of Jim Waleke).

Koni Strut Comparison Item Part Number Price Color Notes OEM Koni strut (front) 4656356 $460 ea. Black OEM Koni strut (rear) 4656196 $390 ea. Black MP Koni strut (front) P4876812 $225 ea.

Black MP Koni strut (rear) P5007000 $245 ea. More.

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