Here is a good condition 1976-1979 Porsche 924, 1995-1998 993 C4, or 1995-1998 993 Turbo Clamping Sleeve removed from a 1979 Porsche 924. Part number 477521145A. One of the original bolts was lost and the other was not in great shape so I purchased two new bolts with the closest shoulder I could find. The new bolts had to be cut to length but are much stronger than the originals. I took some approximate measurements. The length of the part is 88mm and it looks to be about a 20mm spline. Please see pictures for more description. Please verify fitment for your application using part number provided. I have many VW and Porsche parts listed, so please check out my other listings. These parts will be well packaged, tracked and fully insured when shipped. Free USPS Priority shipping. Please ask all questions prior to bidding. Thanks for looking. (Location T20)