740i Performance Chip

New to the board here and I've got a quick question. What are some good chip tuners out there for the OBD1 740. I know a little about Dinan and Conforti, any others? Of the two, anyone have an opinion of one vs. the other? Thanks in advance.

mike

I installed the Racing Dynamics chips for my car. The chips made a noticable difference. I would not say this is "seat of the pants", but it is noticable nontheless.

Depending on the money you pay, this is an easy HP increase. I would try looking on E-Bay to see if you can find someone selling chips for your car on there.