zx5

Hi I have a 2003 ford focus zx5 and I've been wanting to do some things to increase performance of the engine I always see alot of good info in these threads but where would I start and what would be a good idea for a 17 year old engine with 130,000 miles on it. Any ideas on where I could start?

Sydney doesn't quite have 120,000 miles on him. He's a wonderful car. I'm good about changing the oil, and getting air in the tires. But that's all I regularly do. In general, I'd like to know how to keep him going for another 120,000 miles. There are also a few things that aren't working right...

So I’m having trouble finding the correct wiring harness that fits my 03 ZX5. Any ideas on where I would get it? I’m trying to install an aftermarket radio. Here is a picture of the connections. Any and all help is helpful Thanks.

Suspension kit for 07 ZX5 Looking for a suspension kit that will take my 07 ZX5 out of the clouds. Not too worried about performance, but also don't want to just change springs, but shocks and struts as well.

I'm looking to buy a focus perferably: -Low mileage -Clean, Taken care of -Stock for the most part -Zx5, Zx3 if its nice enough -Comp Orange!!! Black is good too, silver is okay -WOULD PERFER AN EAP CAR BUT... I've got a decent budget, and really want to give one of these cars a good home...