Correct. You can use either the OEM sized filter or the larger G37 Sedan oil filter which is slightly taller (more capacity).
This feature was something that was critical to us in the designing of the kit as most end users do not want to have try to remember or keep up with an odd ball (non-OE) oil filter number. The sandwich plate adapter (both thermostatic and non-thermostatic) are the same for all variations of Z1 Oil Cooler Kit. The only real major difference in each version is the actual core size and the type of sandwich plate adapter. These options are given for a few reasons, two primarily being:
- Customer needs - Driving style, enviornment, etc.
- Price - Each customer's budget is different.
Dustin