My 07 Si

[1stgen]

@Ilya

lol you basically re-phrased me.

It’s a very similar principle as to why your car is more peppy when it’s 32* outside as opposed to 92* outside. You could have 20% humidity both days and I’m pretty sure your car will run much better on the colder day in terms of throttle response, etc. Unless it’s just Maxima’s…which I doubt lol.

Lower temps = better car performance. I’m sure humidity plays a role, but so does air temp.

All cars run better when the air is denser....what i'm saying is the t.b. spacer isn't giving you that drastic a drop in temp and that it's the increased runner length increasing your power and throttle response.