there are a ton of big $$$ biggg power builds in the ls1 world using these. a lot of big shops sell them as part of their “custom FMIC kit” for various setups. there are a lot of skeptics and critics. 99% of them are humpers who have no idea what they are talking about who are just relaying hearsay
edit: GARY this was NOT directed towards you, i was typing this before your post showed up. just saying, obviously most internet car forums are filled with engine builders (sarcasm)