To make a long story short:

When I did my SE 103 Stage IV upgrade I changed out my stock head pipes to RUSH True Duels that were ceramic coated inside and out. My tuner was not happy with my choice in headers. But I ended up 100 hp and 98 tq

The ceramic coating didn’t seem to be helping with the heat, so I thought I might as well and do the headers my tuner suggested and put on some Vance & Hines Power Duels.

The first pull on the dyno with no retune was 105 hp and 102 tq.
All said and done I ended up with 109 hp and 102 tq.

The new headers added 9 hp and 4 lbs of tq.
I only needed 1 hour and 16 minutes on the dyno with the retune, so the retune cost wasn’t as bad as I thought it would be.

I had always thought that it malarkey about these headers adding hp, but I must admit apparently they do.
To say the least I am very happy with the new headers.

On a side note the sound changed too. They don't seem to be as loud, but I like the sound better now. It seems lower and more thumpy. It's more of what I am looking for.

 

Sunday night blip

 

I just put the PD's on my TCU and I'm impressed with the low end increase I got with them, Monster Ovals and AC. Haven't got any dyne numbers but the seat of the pants tells me it works. I plan to add 103 kit later.

Love the look and quality too.

 

So the Vance & Hines Power duals added 9 hp and 4 lbs of tq over a set of Rush true duals. I guess you didn't loose all that much torque with the true duals, as I have read from quite a few posts on the forum. I would have thought you would have gained a bit more TQ after changing out the true duels for a 2-1-2 headpipe? Good numbers!

 

A buddy/former co-worker of mine has an 02 EGC w/duals and the Samson Ovals (He has the 95 kit- I don't know which cams) It goes pretty good. It's faster than mine !!!
For perf the 2/1 is best . . . But these are the look & sound (& what a sound!!) he likes.

 

It is, what it is. So make of it what you will.