Product review (5 stars): An Exact OEM Replacement Part
Over time oven gaskets tend to 'char' and become inflexible thus allowing excessive heat leakage.  Thus depending on your oven usage they should be replaced from time-to-time.

Once you've confirmed that this gasket part number is a match to your model of Kitchenaid (and sister brand) oven it is a breeze to install.  The gasket's permanently embedded spring clips pull out and push in easily by hand, leaving you to remove and re-install your existing gasket-end retainer clip (i.e. not included) with a simple screw driver.

Your gasket part number can be found on the net by Googling your oven brand and model number and then selecting one of the appliance part supply houses.  As I recall this item was US made and carried the Whirlpool brand name.

I found that prices vary widely, while Amazon was among the lowest cost options (including shipping).