there is a difference between the factory and the good HFC . Def. worth to change it!

 

OK i just ordered the AMS 780 cc fuel injectors. The ETS goodies arrived too!!!

 

Yes, get 780cc injectors. Should be enough.

 

There's not much difference between a good HFC and a Test Pipe.
There is a big difference between Stock CAT and HFC (one with a metallic core).

A good HFC should not through a CEL and will pass emissions (non-visual)

Upgrading your CAT should be your next step

 

Which HFC are you talking about?

 

Like the following....

Vibrant - http://www.verociousmotorsports.com

Random Technology - http://www.randomtechnology.com

 

I personally ran the Randomtech and it was a BIG difference over the stock cat.

I the reason I went with the Randomtech is because I was like you, I wanted to stay with the stock cat. I installed cams and everything, and just was NOT satisfied with the results. So I went with a high flow and got much better results.

But in the end, I eventually went with a test pipe. You spend all that money, only to not use it. Think about it. If you stay with the stock cat, you might as well not even buy 1/2 those parts. I am being DEAD SERIOUS! It won't be worth it.

You only need to put the stock cat on for emissions, and it is an easy job. Heck, just about any car shop will do a swap for $50. It is certainly worth it to pay an extra $50 once a year, than to spend $3,000 and only get $1,000 value out of those parts!!!!!!!!!!!

Oh, and don't worry about injectors (not until you get a bigger turbo). I would also recommend an SMC Meth kit. You will FLY!!