I have search internet for this white part , peoples told me it called side-skirt , but I couldn't found any , because my car is doing rust repair , and re-paint , so , I need to get this parts , can another name it part ? and around how much ?
Click to view attachment
Click to view attachmentClick to view attachment Click to view attachment

http://cgi.ebay.com/ebaymotors/Porsche-914...=item4cece5e34e

The white part is not a "factory" part. In the PET, the factory part is called a sill cover (801-20, #10). Sometimes I've heard it referred to as an "outer rocker panel". Rust repair panels are available from, among other places, Restoration-Design (search...)

because it seem like a piece of cover on top or outside the rocker panel , I know that part had been replaced from the previous owner , it look have shape like better that original ....
for the link from ebay , anyone using it now ?
anyway , thank you for the information

Looks like a set of jackstands are the next part you should be looking for