performance products [Archive] - Hummer H2 Forum: H2 forums

performance products

09-04-2003, 07:06 PM
Can anyone tell me which product has the most bang for the buck...

Breathless-breather, programmer, muffler

xtreme - breather, programmer, muffler..

Suggestion and comments welcomed

Which programmer really offers the best options and performance?:banghead :banghead

09-04-2003, 11:33 PM
With the Xtreme package (exhaust,cold air intake and programmer) you can pick up 70 HP and 2 1/2 mpg on your H2 for $1199.99. You can't go wrong and you don't need to change your octane level to mid or hi if your currently using 87.

The Xtemeflow powerfalsh will do just about the same as a Predator and it is also a scan tool like the Predator.

Whipplechareged :)

09-05-2003, 07:59 AM

I have been leaning toward the Xtreme products, but wanted to get as much info before ordering.

09-08-2003, 07:57 AM
I'm looking at HYPERTECH Power Programming. Any comments on this product? :flag

09-08-2003, 12:28 PM
The only thing is that the Hypertech will not take out your torque management. That is the main thing you want to do.

Only the Xtremeflow Power Flash and the Predator will do that.

Whipplecharged :cool

09-14-2003, 05:47 AM
where can i find this extreme package?

09-16-2003, 02:47 PM
You can find the Xtremeflow package at
or call them toll free 1-877-423-9873

Whipplecharged :cool

09-21-2003, 05:52 PM
Ok. I purchased

breathless k&n intake with towers and new throttle body,

Xtreme flow H2 muffler and powerflash reprogrammer.

I am getting 10.3 avg now..

will let you know how installation and power improvements, progress.. once I get it installed...


09-23-2003, 09:43 PM
Let me know how you like. I have been enjoying mine for a while now...

Whipplecharged :D

09-30-2003, 05:03 PM
Just installed the xtreme h2 exhaust.

Love the sound.

Probably my imagination but it seems to have more power:


More to come!!!

10-03-2003, 07:37 AM
Ok, added the xtreme muffler... great sound, feels stronger, Increase gas milage in city avg 10.3 -10.5.

Added the Proflash programmer, avg 10.5 - 12 .3, pretty good!!!

Now I get avg 12.3 in the City, Have a trip in oct can't wait to see if Highway is better, (before Highway 9.0 @ 80 mph)


10-25-2003, 11:59 AM
Ok, the way I figured it out, I need to drive my H2 34,333 miles with the $1030 Extreem package before it begins to pay for itsself. Taking into consideration $1.75 gas per gallon and a 10 to 12 increase in MPG.

Average cost per mile at 10mpg=0.18 per mile
Average cost per mile at 12 mpg = 0.15 per mile
difference =0.03 cents per mile.

$1030/0.03 = 34,333 miles

Not looking at the performance increase aspect, is this mod worth it just to pick up 2 mpg? did I do the math correct?

10-28-2003, 08:40 AM

The Xtreme muffler, power programmer and breathless stage 1 intake is worth the money. Although the economics is not the greatest return on your investment, I didn't buy the hummer for gas mileage..

The increase in power and sound as well as the improved economy is well worth the $$$$.

By the way gas mileage is bck down to 11.3 avg due to lead foot syndrome..

Gas mileage off Road is around 3.0 mpg, depending on the size of the hill or depth of the hole..

Also idling for extended periods hurts the mileage as well.

Oh well if I could do it over I would do it again!!

Jerry:party :cheers

10-28-2003, 10:52 AM
For us new H2 owners, do these modifcations void the warrenty?