SW20 Gen 3 (15301-88461): 546mm grommet to tip, 496mm grommet to full, 519mm grommet to empty
ST205 (15301-88480): 499mm grommet to tip, 449 grommet to full, 473mm grommet to empty
edit -
http://www.toyodiy.com/parts/xref?s=153 ... 8461&mJ=on
It looks like this same part was used on all 3SGE and 3SGTE SW20s from 1989-1999?
However if you compare these, you see the dipstick tube has different part numbers:
http://www.toyodiy.com/parts/p_J_198912 ... 105.4.html (Gen 2)
http://www.toyodiy.com/parts/p_J_1995_T ... 105.5.html (Gen 3)
The ST205 one, however, is exclusive to the ST205 it would seem.
double edit: I thought I was using the MR2 one, but now I look at it I'm using the short one, so I have a spare Gen 3 MR2 dipstick (which is generic to all MR2s) and tube (which isn't). The next question is - will it bolt to the Gen 2 thermostat housing?
I'm going to go and measure the length that protrudes from the bottom of the dipstick tube, this should be more telling...