If I was gonna get a 04 GTP this is how I would mod it in order.

Cold Air Intake.
Complete exhaust headers included.
Rockers 1.9 Intense.
PCM with programming for the rockers.
Intercooler from intense w/spacers and injectors.
SLP MAF w/ adapter and supportive programming in PCM.
Colder plugs and Modular pulley system.

Really the last three would be done mostly together. But with a 3.4 Intense Dyno shows about 280 horse. Just on the virge of blowing the tranny. And with the smaller pulleys you probably would.

Purpose of post = Nothing.

If you're going to spend that much on a GP, why not just get the GXP or a GTO?

Because then its not a Grand Prix.

GXP is

I would wait for the GXP also... I know there is a blower kit for the 5.3 trucks right now, so only a matter of time for the kit to be on a GP GXP. But the question is still - will the tranny hold?!?!?!

The tranny will not hold. There is a blower kit for the 5.3 imagine it wouldnt take much for it to work on the ls4 but by by tranny and hello intense.

Yeah but that is not until next year and (homer simpson voice) supercharger..........

Next year but early...I thought like March-May, that is not too far off.

Ok, I read the article again...it says production will start the first quarter of 2005. But still not too far off.

I think it is great that you can get a V8 in these cars again! The day everyone switch over to V6 was a sad day form me....I understand why...but still sad. Now they are coming back!!!

Only a matter of time before Chevy/Buick jump on the bandwagon.

I would add in a scanner. Maybe even a programmer/ scanner instead of the PCM.

Wait for the GXP. No reason not to.

What in 06 or 07 It'll have a new tranny a 6 speed auto I think. I think the early GXPs will have the same tranny backing the caddi Northstars.

I was wrong GXPs will have the same 4t65ehd we have now But the six speed is in the future.

Yeah caddy gets all the cool stuff first.

Yeah but pontiac usually gets it second so.....