I need some advise to up the performance of my 2002 Cat 4x4 300
What is the front diff locker and mod shifter and where can i get it?

What about the tail pipe. I have seen something about cutting something off.

I need to make it One Bad AZZ machine HELP

 

You can't do the frt diff mod on 2002 and newer. You might want to put a lift kit in and get a K&N filter system. Unfortunately I don't think you'll ever make the 300 a bad *** machine, its just tough and dependable.

 

I put a Moose lift kit, a K&N filter on mine, and it is still a T U R D.....[img]i/expressions/face-icon-small-smile.gif[/img]

But I love IT. Mine is an 01, so I was able to lock the front end. It is almost unstoppable.

There are a couple of universal pipes you can install on your cat, but I don't think they will help that much (specially for the price, about $300).

I am planning on getting some wheels spacers for the back to make the track wider, and also want to "slot" my lower rear suspension pick up points so I can give the rear wheels some negative chamber. This should make it handle better on fire roads.