vascott99

All:

Trivial question.

My 79 has the stock 18mm rear sway bar. I came into posession of a 21mm sway bar from an 86 911

Can I use this one...

mel_t_vin

Someone else may know, but I'm not certain it would bolt right up. If it does, you can use it, but be prepared for additional oversteer with the larger rear bar/stiffer rear end.

If if doesn't, or if you don't like the added oversteer with a 21mm bar, '86-'88 930's came from the factory with 20mm rear bars, p/n 930 333 701 25.

Let us know how things turn out.