Does anyone know if the 997 wheel hubs will fit a 996? Also I know front and rear have different part numbers but they look identical - are they interchangeable front to rear?

Thanks

 

Yes, 997 part numbers supersede 996 numbers (and appears a 991 is latest rear revision), and different front vs rear

 

Ok thanks - i wasnt clear on your last point - I know the part #'s are different front and rear but are the hubs actually different?

 

I quickly glanced at PET and it looks like the latest front hubs are a 991 part number (991-341-605-03). The latest rear hubs appear to be a 997 part number (997-331-605-01). Could be that the rears have a new revision but I did not see it.

 

lol funny enough John I still see a 997 # for front and 991 # for rears...go figure.
Might email my Porsche parts guy tomorrow and see what's what and get some pricing, will probably refresh the rear hubs over the winter

 

Post up the #s when you get them Rob. I am picking up the 300M hubs tomorrow. They are finally done. I'll post up pics..

 

Will do John! excited to see the pics, the peace of mind they'll give must be great!

 

The hub part number were these when I bought some last week:

Rear hubs: 991-341-605-03
Front hubs: 997-331-605-01

 

Finally picked up the rear 300M hubs today... I have to say they exceed my expectations. These are forged out of 300M (Vacuum remelt steel), heat and cryo treated. Based on the metallurgical assessment, these are calculated to be close to 200% stronger that the OEM hubs. I do have an extra pair available if any hardcore track guy is interested. On the stock hubs I've been averaging 2000 track miles between failure$ so the OEMs are an annual replacement for those tracking hard averaging 20-25 days per year.

[url=https://flic.kr/p/MiLV2G]

[url=https://flic.kr/p/LNhcJ5]

[url=https://flic.kr/p/MzJ2Mh]

[url=https://flic.kr/p/MzJ2WL]

 

very nice John!

and my dealer parts buddy agreed with your part numbers 991 front, 997 rear...weird there are conflicting numbers...

 

Thanks Rob. Yeah, PET is not always accurate.

 

Thos are nice! Just curious how much you want for them? I don't even have a car yet lol just curious for when I get one as the cars I'm looking at for the most part are already modded cars (let the previous owner take the hit on modding costs ) This seems like a nobrainer type mod as I do plan to track the car a few times a year.

 

$1300/hub

 

John - what do you consider failure of the hub? Was it the thread you made before "check your hubs?"

 

I think I may have detailed it in the other thread on the 6GT forum but here are some pictures of the failures on the hubs. They normally fail just outboard of the bearing at the base of the hub "neck". This area is a stress riser. The combination of the torque and lateral flex is what eventually fatigues the metal.

Failed 996 hub:

[url=https://flic.kr/p/oBB39v]

Failed 997 hubs:

[url=https://flic.kr/p/yuMdAv]

[url=https://flic.kr/p/za9GRV]



As I detailed in the other thread, here is some of the collateral damage when the hub fails. You will also damage the caliper and destroy the axle in the process as the splines get sheared off. The parking brake shoes also get damaged.

Damaged upright:




Damaged brake rotor hat:

[url=https://flic.kr/p/zqAKCC]