What's the difference between a red top and black top sr20?

[S13240]

Now that I've got your attention, do you know how to tell the differences between an s13 chuki black top and an s13 kouki black top besides the ecu?

[SpeedRacer1]

There is random crap to check. The Kouki S13 SR has the following that the 94-96 does not:S14 Alternator part number 23100-65F17. If it reads anything like 23100-52F** then its a middle gen.S14 transmission, S14 clutch disk and pressure plate. If you can find the pressure plate part number and it says 30210-40U05, or 40U** then its an S13 SR made in December 1998. To get a general idea of when the SR was made take out a coilpack and look at it, the dates they were made are on the stems of the packs, they are marked 12 times a year, once per month, just count and see when the last stamp was.The MAFS also has a harder to read production stamp if you have access to it. And the recirc valves on kouki's had a mirrored sticker instead of a stamp (cant remember the accuracy of this one).

Theres other crap that I cant remember, but check the alternator and coilpacks, they should give enough info.

[S13240]

Thanks SpeedRacer1. Always can count on you for info!