I'm tired of tripping over these.
Edelbrock slip-on merge collector. 1.75" primaries, 3" outlet. Ti-TECH coating, which kinda looks like grey paint to me but is obviously much more exotic. I'm sure I read they use this on the Space Shuttle or something. Usually sold in pairs, but I used the other one to make a header for a four-cylinder. $35 plus shipping.
1.6 Miata flywheel from Fidanza. Will fit any 1990-05 Miata as long as you use a 1.6 clutch. 7.5 lbs, includes the pressure plate bolts. Perfect for autocrossers looking for the lightest rotating mass possible. It was engaging smoothly when I pulled it out of my wife's car. Despite appearances from the camera flash, it's not rusty. Suggested retail is $595 Today's special price is $75+ shipping, because I like you.
Also available: random 1998 Camaro Z28 bits (no, not the engine or drivetrain), a pair of refreshed Cadillac 427 heads, power window actuators from a Mazda 323 GTX, an MGB GT rear axle and springs and other exciting random things that I'll dig out soon.