I'm posting this up for a friend. I'll be removing his LS6 cylinder heads soon and he wants to put them up for sale.

The are the LS6 243 heads, sold either with the stock springs/retainers or with the upgraded pieces on them now:

crane dual springs
http://store.jandjspeedshop.com/pro...products_id=292

crane titanium retainers
http://store.jandjspeedshop.com/pro...products_id=293

The heads only have 20k on them, less than 1k miles on the upgraded valvetrain for his latest cam. Springs shimmed to give 135 lbs. seat pressure

He is selling so he can buy some huge AFRs I have sitting here, otherwise the LS6 heads have performed very well and he would have kept them.

He'll sell them upgraded for $1,000 shipped
or with the LS6 springs and retainers back on for $800 shipped.