Theres been a lot of good responses from people on ZZP's HV3 insert.

For those who don't know about it, I'll let you read about it on their website:
http://www.zzperformance.com/grand_prix/products1.php?id=214&catid=113

Anyway, found a slightly used one for sale on clubgp for this interested:
http://www.clubgp.com/newforum/tm.asp?m=3704000&p=1&tmode=1&smode=1

I had this before doing my top-end swap and loved it. I would highly recommended this to anyone wanting to stay N/A but still make good power, this along with a cam and headers would smoke alot of GTP's.

i have seen this firsthand from a local member, and this thing is definately worth every penny!