Sorry to tell you scott my coilover have no clunk at all I have 16.000 miles on them. There customer service is great there only 100$ a strut to revalve so all and all TEIN has my vote for great products. I would even go as far to say there the best coilover set for the WRX (not all cars). Inverted struts are great but you can lose more unsprung weight by getting rid of your 22 pound P1's or by getting STI A arms.
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Subaru using the slightly different Exkimo spelling "Soebahrue" which is pronounced EXACTLY the same, it means "Man who beds with seals"
I saw Chimok down on the ice floe doign that thing with the seals again. He's a total Soebahrue.
www.level4racing.com