Who does port work on stock headers or sell ported ones?
Thanks.

 

In Stock

 

How bad are they...that they need to be ported? Any pics of the inside of the stockers?

 

It's a pretty easy DIY job. You need a die grinder with a good carbide tip and about an hour or two of patient grinding.

You are really just cleaning up the sloppy welds on the inside of each pipe where they attach to the header flange and in the collector on the other end.

Once you are finished all of the grinding, make sure to clean out the pipes really good to remove all of the metal bits. A garden hose and dragging a rag though works good. You don't want the metal bits to find their way into the turbos, cats and O2 sensors.

 

I am curious if the ported headers provide any performance gains??

 

According to Kevin at UMW they do. I did mine when I installed his turbos. It's an easy enough 2hr DIY that it's worth doing. Can't hurt. I would say that by grinding down the welds I made the ports about 10% larger. In many cases the excess welds are pretty substantial. You can buy a Die grinder at Harbor Freight for $40 and then you will need a good carbide tip. That's the key....

 

Agreed. If you have the means to do it. Just wear goggles and shoes you don't like.
Some shops will do it for some labor time. Be sure not to grind through the welds, just smooth them almost flush.

 

Think I'll give this a try over the winter. I sold my die grinder and carbide bits though a couple summers ago! DOH!!

 

For those with a credible history here or the other forum, I'd be willing to loan you my air powered die grinder and a couple of carbide bits to get the job done. Just cover the shipping both ways and return it promptly.
It's just a cheap Harbor Freight model that I bought to do the job and haven't needed it since. I also have a couple of used bits that Kevin@UMW had retired and given to me when I did mine. Still a lot of life left in them.

 

^^ VERY nice offer of you!!

 

Its a good upgrade and its cheap if you can do it on your own. But, if you port too much you will weaken the welds and they will crack- I seen it first hand. I actually welded it all around on the outside.....

 

Sambo... Do you sell ported stockers and take the core exchange? I'd be willing to do that this winter when the car is in hibernation.

 

Hi,, I have seen some early model ones have a lot of weld build up and then I have seen late model ones,,like mine, with little build up..
Do yourself a favor and do a Search,, good info to be had..
Good Luck

 

This.

Seems the early years had more weld material you could remove. Seems the factory sorted it out in later years.

I would definitely send the set to swaintech for coating.

 

Yeah the 997 units look much better. Same part and #