anyone intalled NHP full exhaust???

[2K3_Boxster_S]

Originally Posted by cnavarro

Update:

About 8,000 hard miles since May and two welds have broken on the muffler, one on the mounting bracket and the other on the heat shield.

The o2 sensor extensions have eliminated the CEL completely that appeared after about 6,000 miles with the sport cats.

the heat shield weld is only covered for 3 month's. they will repair the mounting bracket weld, but you have to pay for the shipping, probably cheaper to fix it yourself. what type 02 extensions did you use? are they all stainless?

[cnavarro]

Originally Posted by 2K3_Boxster_S

the heat shield weld is only covered for 3 month's. they will repair the mounting bracket weld, but you have to pay for the shipping, probably cheaper to fix it yourself. what type 02 extensions did you use? are they all stainless?

Fixing it myself, just wanted to share my experiences (both good and bad).

I purchased the ones sold by FVD - they were indeed stainless. The only thing missing were copper gaskets for the extension which we sourced locally.

[jhandy]

I have the headers and bypass pipes only and dynoed a modest improvement.
What the worst thing is the supplied manifold gaskets. They are crap and will delaminate and after fixing several leaks, I just reused the stock gaskets, and no more problems noted.

[Adam]

2K3, I was just wondering how are you liking the NHP system these past few weeks and would like an update? Are you just satisfied with it, ecstatic, or do you not care for it? Is the sound and hp gain worthwhile? Did the CEL issue cure itself or is it still there? Did you get a tune or still thinking of getting one? Thanks for the feedback.

[2K3_Boxster_S]

Originally Posted by Adam

2K3, I was just wondering how are you liking the NHP system these past few weeks and would like an update? Are you just satisfied with it, ecstatic, or do you not care for it? Is the sound and hp gain worthwhile? Did the CEL issue cure itself or is it still there? Did you get a tune or still thinking of getting one? Thanks for the feedback.

Yes, I love the sound. Car is entirely more enjoyable to drive. Bottom line the car is faster and you can feel it. I will do some in car video and post later.
I will be going this route: http://www.giacusa.com/programs.php?mpid=37 for more Hp and Tq. It will be a while though. I have been busy with rental house repairs and finding new tenants. Looking at mid Oct. to get the GIAC loaded. Try to shoot some Vid tonight.

[Adam]

Ok, sounds good. How about the CEL? Maxspeed claims their headers with cats don't cause CEL's, is this still an issue?

[2K3_Boxster_S]

Originally Posted by Adam

Ok, sounds good. How about the CEL? Maxspeed claims their headers with cats don't cause CEL's, is this still an issue?

Yes, I still have the CEL. it appeared after about 100 miles. I'm not to worried about it right now, as I am about to do the ECU upgrade. If its still there after, I will get rid of it. Also the following is from MAXSPEEDS's website. They don't guarantee no CEL on all models. Check it out:

MAXSPEED

"All of our exhausts are made with Tri-Metal 200 Cells Catalytic Converters, obviously these are much less restrictive and flow more exhaust than the factory 600 or 800 Cells Catalytic Converters used by Porsche at the factory."

"After selling many of our exhaust parts that use 200 Cells Sports Cats we have noticed that on Porsche 986 All Models starting in 2003 the ECU's are much more sensitive we have been getting reports from customers who have experienced the Check Engine Light again starting year 2003, we have never seen it on Pre-2003 models but it could happen as well. Some who own 2003 Up models do not experience the Check Engine Light."