335i's still have tracking issues. Your normal inexperienced driver at a DE doing 12-25 minute sessions will probably not have a problem. They are not up to doing 30 minute sessions at the hands of a very skilled driver that can push the car to the limit. They heat soak, lose a lot of power, then overheat and go into limp mode. I've seen one guy really pushing his 335 at the track and it turns out he did have an aftermarket intercooler and tuning. From posts over at the track section on BfC people were seeing failures this past year at the east coast BMW CR events.
As for Dinan.. They deserve to lose their business. Their products are overpriced "designer" items. You can easily buy better, more affordable parts from vendors like Bimmerworld, RRT, Turner, etc... There is no need to spend what Dinan charges for their products. |