Okay, first off, are there any leather seats that can be swapped into a civic, I have a four door. I don't know if the Integra seats will fit in or not, or if it would be better to just have the seats re-covered. Second, there is a sensor attached to the intake, when you get an intake system, is ther a place to plug that sensor in, particullarly the intakes off of ebay. Third, throttle body spacers- the airaid poweraid, does it really do anything. Fourth, I need a tune up, are there any parts i can get for my tune up that will increase the performance of my car. Fifth, I wanted to get the tweeter mounts out of an EX or Si, do I have to get them out of a four door if I have a four door. Finally(sorry, I know I've got a lot of questions) has anyone used the gauge cluster white face covers, if so how did it work out for you.