mani's. I know many members here talk bad about them cracking. I bought my set used back in 2003 and till this day I have had no problems with them. I would like to see someone make another version of them with a slightly larger piping for more flow. This would help with a larger turbo setup and either Ash or Z1 piping kit. I will be doing a motor pull sometime in the next month or two. I might try and find someone to fad up a better version based off of these so I can fit the EXP 100 kit on them.