Phew luckily I didn't buy any J's Racing products, but I do own a couple T1R products. Those T1R products are performing at the track and showing gains so I am happy for now.
Off-topics, but for those that are worried about authentics parts (this could save you your hard earned cheque).
Guys if you want to buy genuwine, authentic parts I deal with my buddies in the states
http://www.bulletproofautomotive.com/
These guys are the real deal with a personal shipping container from JPN->US...the owners/buddies are even in Japan at the Amuse/ASM shop as we speak...
One of many proofs, cuz I'm sure everyone is uncertain at one point in time spending $$$
http://www.s2ki.com/forums/index.php?showtopic=757076