When Thadya and I were at Infineon with her car, it wasn't making power. We had to block off half the radiator or it would just dump fuel. I couldn't even pass a Datsun 510 on the straightaway with a built gs-r. I had Jei from Blacktrax ride with her in the next session and he figured out it was the spoon thermostat. It would have been ok for us in the summer, but with the cold weather it wouldn't get up to temp.Don't get a mishi thermostat for a stock DD. You will never even get to operating temp. s*** opens way low for your application.