This is for an 03 2.4L. I am almost due for a timing belt change. I am at 136k miles and the last time it was done, was at 80k miles. Last time, all that was replaced were the timing belt and balance shaft belt. I want to know what should I replace when I hit 140k miles. I made a list below, let me know if I need to remove or add anything. My next question is about the header, my car has a pre-cat and a main cat. If I put a header on, which deletes the pre-cat, will I still pass inspection even though I still have a main cat? I think the Fed Spec Galants do not have a pre-cat, correct? So essentially I would be able to pass with a header on right? Also, will a 3g eclipse header and downpipe bolt right up? If I am correct, the only difference between a 3g and 8g is only the piping after the main cat. Thanks.

List of Parts I am going to replace:
Timing Belt
Balance Shaft Belt
Camshaft Idler Pulley
Camshaft Tensioner Pulley
Balance Shaft Tensioner Assembly
Camshaft Tensioner Hydraulic Assembly
Timing Belt Tensioner
Water Pump
Water Pump Seal and O-rings
Camshaft Seal
Crankshaft Seal
Oil Pump Seals

The Drive belts have been recently replaced, so no need to change that.