QUOTE(rickthejetman @ Mar 24 2010, 11:52 PM)
i really need to know the year.
p/n on the strut housing is 911-041-079-04
Why?
I agree with DD, the 2nd group is '341'
The manufacturer name will be on the strut body.
it's probably 'Boge' especially if it's 3" caliper spacing.
(But read on, I think you have a Bilstein.)
You don't need to know the year so much as the gland nut type (which the mfg name will tell you) and the ball joint type.
What kind of ball joint does it take? Your choices are pinchbolt (early) and crosspin (later). If the retaining boss is split, it's a pinchbolt.
As it is a 911 first group, it _should_ be a '72+ pin-type ball joint.
ETKA says a 911.041.079/080 is the L/R S-caliper (3.5" spacing) Bilstein strut from a 1974 911/911S. Will definitely have pin ball joints.
My reference of course has a completely different 4th group ( .36 ) which should just be a minor difference such as valving or internal improvement. Entering the part number into the 'search by part number' calls the part 'pressure damper' which in 911-speak means Bilstein.
A .04 4th group may mean that it was a part bought through Bilstein aftermarket sources and not original to the car. I for sure can't say for sure.
Not to quibble with DD's Pelican reference, but I think you have an S-caliper 1974 Bilstein...
Get back to us after you've measured the caliper spacing and read the strut tube for mfg names again ...