We've just completed the first round of the 924-944-968 group buy for the newly developed Stage8 locking CV bolts for these cars. During that group buy, we received a number of inquiries from 911 and 928 owners looking for a solution for these cars as well.
To cut a long story short, we poured through every page of the applicable PET files, and discovered that we could address the entire range of 911, 912, 914, 924, 944, 968, and 928 with exactly FIVE different bolt sizes: M8x50, M10x45, M10x50, M10x55 and M10x60.
The first round was such a big hit (110 participants!!!) that Stage8 has agreed to extend the group buy discount -- 25% off MSRP -- from now through 15 April 2010, including all of the new applications. This is a completely new, never-before-available product for our cars, and we have all of the 110 participants from Rennlist, Pelican, 924board, and 44cup to thank for that!
The special group buy ordering can be done here:
Ideola's Garage: Stage8 Fasteners for Porsches - Special Group Buy Pricing
If you'd like to learn more about the 911-specific applications, here is the group buy thread on Rennlist:
Group Buy (ACTIVE): Stage 8 locking CV bolts, Round 2 - Rennlist Discussion Forums
Specifications
• Bolts Are Aircraft Quality Grade 12.9 – 4130 Alloy Steel
• Retainers are 5052-H32 Polished Aluminum
• Snap Rings & Clips Are Spring Steel
Background & Product Details
For those that missed the first round, here is a repeat of the details. I worked with Stage8 to develop a locking CV bolt kit for the entire range of 924-944-968 cars. It was such a huge hit, that some 911 and 928 rennlisters contacted me about offering these for their cars too. I did quite a bit of research to investigate all of the permutations across these cars, and came up with 4 additional bolt sizes to accommodate the entire range of 911 and 928 cars, which Stage8 is now geared up to produce. This is truly a brand new offering, never before available for our cars!
Depending on model year and options, the 911/912 applications utilize twenty-four, sixteen or twelve M8 or M10 cheesehead bolts to attach the half shafts at the transaxle stub axles and the outer hubs (six bolts per CV joint). As many of you know, the cheese head bolts are a royal PITA to deal with and will strip out if you're not careful. And for track driven cars, there have been multiple reports of the bolts backing out mid-session with catastrophic results. Many guys are safety wiring their bolts, and this was the approach I was planning to take on my UWB project until a 924board member mentioned Stage8 (for a header bolt application).
The Stage8 system utilizes their patented "GrooveLok" bolt, which has a 12-point head and a special groove in the head. Once the fastener is torqued down, any number of clip shapes are available, which lock onto the 12-point bolt head, and are then retained using either an E-clip or snap ring. Here are some photos using the samples they sent to me installed on a late offset 944 CV joint, boot, and outer stub axle:
Sample M8x65 GrooveLok bolt (the standard 911/912 size would be M8x50, M10x45, M10x48, M10x55, or M10x60)
Teardrop and D-Style clips; snap ring and E-style retainers
D-style clips installed, E-style retainer on left, no retainer on the right (I didn't have a snap ring plier handy when I made these photos)
Teardrop retainers installed (again, no snap rings, but they would normally have the snap rings installed)
Questions? Interest? Let me know!