ktm Posted January 22, 2011 Share Posted January 22, 2011 (edited) the Subaru studs have a .565" knurl. seems a bit snug compared to the .505" stock knurl. They are the same thread pitch as stock though. Still a bit pricey at $34 for 5 studs. Edit: Now I know why I was confused. I am thinking 240sx.....let me tell you how I confused a 240sx with a Subaru. I used to live right down the road from Gruppe-S in Lake Forest, California. They catered to the 240sx and WRX crowd at that time. I own a 2006 WRX as well as my Z. I would go there periodically for the WRX. I did buy the studs from them, however, for an S13 240sx. The S13 has a knurl diameter of 12.83. This confirms the OP's post. I am using these studs in my front hubs. Edited January 22, 2011 by ktm Quote Link to comment Share on other sites More sharing options...
aongch Posted December 18, 2014 Share Posted December 18, 2014 (edited) If you don't mind a change in the thread pitch and obviously buying new lug nuts... Stock thread is M12x1.25. ARP has M12x1.5 with .509 knurl and 2.5" long The ARP 100-7708 Studs for a late model Camaro are what I have on the rear of my car and they work just fine. http://www.jegs.com/i/ARP/070/100-7708/10002/-1?CT=999 I'm about to install ARPs at least 2.5 in long, but obviously got the wrong knurl size, part 7716 fitting Subarus with .565 mm per some of the suggestions in these forums. ARP sells a 3 in. stud for a Subaru WRX that is the proper threads and they are way cheaper than the NISMO studs. I think they also have a shorter stud and one longer than the 3 in. ones I used. I'm running S30 280Z hubs front and stock rear stub axles I believe (Wilwood disc upgrade). The Subaru studs are definitely wider at the knurled end, does NOT fit. Will get a micrometer to confirm the old stud size. Measured oem 280Z stud knurled diam at .507". Does this mean the above GM 7708 (2.5" long) or 7713 (3.25" long) will fit? Edited December 19, 2014 by aongch Quote Link to comment Share on other sites More sharing options...
aongch Posted December 20, 2014 Share Posted December 20, 2014 (edited) The 'GM' extended studs 100-7713 fit perfectly, I suppose the hub I have is the 240Z version. Edited December 20, 2014 by aongch Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted December 20, 2014 Share Posted December 20, 2014 I need a set 1/2" longer still! PM me a PN if you come across one. Quote Link to comment Share on other sites More sharing options...
aongch Posted December 20, 2014 Share Posted December 20, 2014 (edited) 1/2" longer than the 3.25" I have now, why would you need a set that long? What application? The shorter 100-7708 M12x1.50 are 2.5" long. Edited December 20, 2014 by aongch Quote Link to comment Share on other sites More sharing options...
G-E Posted December 20, 2014 Share Posted December 20, 2014 (edited) 60mm long cromoly... direct fit -- M12x1.25 thread pitch http://responsetype.com/shop/fairlady-z/60mm-studs-13mm-undersized/ Edited December 20, 2014 by G-E 1 Quote Link to comment Share on other sites More sharing options...
duragg Posted December 21, 2014 Share Posted December 21, 2014 ^ is that enough knurl? Quote Link to comment Share on other sites More sharing options...
G-E Posted December 22, 2014 Share Posted December 22, 2014 9mm of knurl, followed by about 7mm of taper, and then 45mm of thread... approximately Quote Link to comment Share on other sites More sharing options...
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