hi all, im thinking of installing a cat bypass on my 05 CS and i was wondering if the car need to be programed or anything...after the installation.

thanks

 

To my knowledge, it's just plug and play. Have fun!

 

This.

 

I just ordered a set of these too. Do they make a noticeable sound difference?

 

to me its annoying, im more of low marine style exhaust rumble.......the cat delete really opens up the sound and popping......it makes very NASCAR loud.

youtube has 100's of posts http://www.youtube.com/watch?v=fzWRxdC7lrA

 

It makes a more raspy sound under full acceleration. Not very noticable in the car at idle. Performance doesnt really increase and gas mileage hasn't increased either. Unless you have a turbo.

 

A muffler might be a better idea - like CORDSIG79 said. Cat deletes are better for turbos. There are tons of different mufflers out there to choose from so make sure you research to get the right sound that you want! :-)