I just took a quick look at my '99 j-spec fascia/Ashspec 2.5" SMICs/piping...(I have the car up on the jackstands). I just installed the '99 j-spec over the 2.5" SMICs/piping. At the sides there is an inch at the sides except at the striping indent (1/2" clearance there). Plenty of clearance at the outside bottom corner due to the squared off lower valance shape of the j-spec corners. BTW, thanks to your posting of pics and dyno charts from SZ visit, I ordered the SZ aluminum accordian replacements and the new tapered aluminum turbo outlets. They shipped Wed...Greg is da man!