4AGZE piston history
13101-16060 8/86 - 7/87 (Japan MR2) -CR unknown/unconfirmed, but likely 8.0 to 1
13101-16100 7/87 - 5/89 (MR2 and early AE92) CR known/confirmed - 8.0 to 1
13101-16130 5/89 - 3/91 (AE92) CR unknown/unconfirmed 8.0 to 1, OR 8.9 to 1???
13101-16131 6/91 - 5/95 (AE101) CR known 8.9 to 1
From over 20 years of experience behind the parts counter, I've seen a fair amount of mis-information. One thing I have seen is that a change can be small, and a small change FREQUENTLy will carry a much more similar part number....
For example.... take AE101 rods. There are 2 numbers listed 13201-19125, and 13201-19126. Yet everyone "knows" there is only one silvertop rod.... When you look up the rods, you will note the 19125 lists for $145, while the 19126 lists for $96. As I see this, Toyota found a lower cost supplier for the rods, and as such since the only difference is price, the part number changed, but only by a single digit.
Ok, now back to the 4AGZE pistons.... the late AE92 slugs carry a part number only one different from the AE101 slugs, the price is the same, so the change could be just a change in suppliers.
Now, the only facts here are the listings, so I promise I wont get my feeling hurt by someone else... BUT - unless, untill someone purchase's both... OR if Toyota shows a substitution of the 16131 for the 16130. There will be little to prove anyones opinions
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