This is am extremely well designed kit. It does require some add’l machining but i think out of all of the girdle kits, this one is the best. I used it on a guys stock RB block that made 741 Hp on dyno with -1 heads. Very nice quality design kit.

And I might add great customer service. When the machine shop misplaced the girdle specs/instructions, i called and got them on the phone right away and they made sure I got the details. That’s super in my book!