No, because they don't know what fucking make a Celica is. If you want me to take a stock header, and chrome it for ya, I will, I've got spare time.
That's most likely what that is. Don't buy something if you don't have a dyno for it, and make sure that the dyno is authentic.
If you wanna save money, then do whatever the fuck you want to. You're not gonna see any gains though, and with some headers, you may lose Performance.
But if you wanna save money, then you'll get what you pay for.
Don't go asking people for their opinions and fucking say that they are wrong, just because you want a fucking pat on the back. I'd also look into a Performance mod chip along with a cold air Intake made of PVC piping.