The Z1, GTM, and Stillen oil cooler kits are all very similar I think. They all use the Setrab core. It's just a matter of how many rows you want: 19, 25, or 34. I just bought the Z1 kit with 25-row core and thermostatic plate adapter. Maybe someone on here knows some differences and will chime in.
__________________
2011 Brilliant Silver Touring/Sport/Nav/6MT --- Build Journal
F.I. SS 18" CBE | Takeda CAI | Z1 25-Row Oil Cooler | Swift Springs | Hotchkis Sway Bars | H&R 15mm DRS Spacers F&R | RJM Clutch Pedal | UpRev Tune
|