Hi, I just purchased a used 2000 626, green with tan interior, 70,000 miles. GREAT car, just needs a little more performance (couldn't find a good V6 model).

The only performance mod I've been able to find so far is the K&N Air filter. Are there any more modifications I could make to the engine to get more performance out of it? (The 2.0L DOHC 16 Valve 4-cylinder).

Also, did these cars ever come with tan leather steering wheels? And what was the difference between the standard and Bose stereo system? Can you put the Bose system in a car that didn't come with it?

Thank you!