Does your s2k blow a lot of air out of exhaust off cold start? Just got this s2k an it has 99k miles on clock. It does have an aftermarket exhaust and intake. But on cold start it blows high pressure air out of the exhaust which slows down when the car is warm. Is this normal?

 

Cold starts idle high (about 2k rpm). It's normal.

 

Just about every car does this (if it has an internal combustion motor)
Totally normal.

 

Thats normal. My car usually at 2k rpms and goes down when warm.