Free Mod List?? Is there such a thing?

[HotRodV6]

Ok, ive done a couple searches and didnt really find anything.

I want to get a run down of all the free mods or very cheap mods i can do to my 03 silverado 5.3L that will help make more power and hopefully increase MPG.

One i will be doing that is essentially free for me, as i have had the muffler new in the box since 2001, is cutting out the stock muffler and installing a dynomax ultraflow welded 2.5 in/out muffler, just cantr decide if i want to dump it or hook up the stock tailpipe, ill proably hook up the tailpipe as i dont want it to be to loud, just a nice mellow rumble.

Thanks for the info on this guys, much appreciated.

[Jeff525]

tb bypass
cutting the stock airbox
porting and polishing the tb if you have the nuts to do it
those are the only ones i know

[DamnYankee]

What Jeff said. To expound a little:

The throttle body bypass isn't really worth the time. It won't hurt anything - just won't help enough to make a difference.

Cut a 4"± hole in the bottom of your stock airbox and the metal tray underneath. Plug the stock holes in the airbox. That will give a little better airflow.

It's gutsy doing it yourself unless you're just really comfortable with a Dremel. You can screw it up really quick.

There aren't really any free mods that will make much of a difference.

Inexpensive: Make your own cold air intake, get a large cone filter from a parts store.

Your best bet is to save up for a tune. All future mods will benefit from it.

If you're still not sure what to do, read those last two sentences again.

[Tolliwacker]

Cheap, Fast, and Good.

You usually can only pick 2...............

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