What can I do about a cracked header??? I was thinking getting it welded wouldn't cost a whole lot, but then again, if it cracked before, it's probably prone to crack again... but I really don't want to have to bite the bullet on buying a new 300$$ header

 

I would say go ahead and weld it, see how it holds. Another option could be look in the for sale section there is usually a header or two on there.

 

Are they aftermarket or stock?

I would just replace them with obx or whatever you guys prefer.

 

Bite the bullet and buy a new one. I would get it welded for a very temporary fix, but seriously get a new one.

 

buy a 4g94 flange get a custom one made true dual exhaust the sucker see what gains u get haha... if its a obx header jus buy new one if its a rrm or a rpw header get it welded again and try wrapping it. or replace where its cracked wit new piping and weld so it wont be prone to cracking in the same spot. dependin where it cracked...but serious true dual!!!

 

What happens if your headers are cracked and you leave it? what types of problems can it lead to?

 

A nasty noise and incorrect air-fuel metering, assuming the crack is upstream of the o2 sensor. Don't leave it.