Originally Posted by Whjaxn17

I've been running the Z1 oil cooler for a while and so far so good. I got the Setrab core upgrade w/ it. Fast Intentions makes a great product, so I wouldn't hesitate with theirs either, but I've also never heard a bad thing about BP, so you have a few good options.

You're going to fully build it, which is great, but these things still like to let go uncomfortably often at or above ~700whp. Yes, even built. It's a head gasket/cylinder deformation issue that so far, it seems only 2 shops have remedied(SOHO and Mazworx). Both claim proprietary methods, so they're rather secretive about how they go about it.