Walker Catalytic Converter ($50): Used for aircare 4-5 only, then the test pipe replaced it on the car. Has 3" inlet / outlet, no flanges.
SR20DET Transmission with KA bellhousing ($80): I replaced mine with a rebuilt transmission, so I have a leftover one. IIRC third gear grinded a bit. Roughly 90-100 K onthe tranny.
Synapse BOV Flange ($25): Brand new from IIM, part# SB001.3A. Greddy R/S/RS HKS Racing Flange Billet Aluminum.
Defi EGT Sensor ($10): Just the sensor, no plug at the end. Guy I bought it from thought it would be more convenient to just cut the sensor.