I've got a custom one they built me that I'm taking out soon. It's looser than the 5C. Smaller diameter than the regular ones they sell. Went 1.54 60' in my NA car. Chris couldn't make this one as shallow as the others, so it uses an 1/8" plate between the engine/trans to get it in there. I know it's probably not what most people want, but thought I'd put it out here just in case.