I'm looking to pair a ZZP mid tube header with a catless dp soon to my gmpp sport catback. are performance gains noticeable? other than an orgasmic sound...what else should i expect when it's all installed?

 

you can notice the gains, other things to expect are more unwanted attention for police

 

haha he's right, there is that. The gains are noticeable but in my experience, I also got a much smoother ride...the power band seems to be "adjusted" also....higher up in the rpm's the car pulls and screams like a .50 *****.

 

Yea I actually think i noticed it more than i did with stg 2.

 

You will notice a nice change in power from 4k on up. The car pulls alot better with the header and DP.

 

sweet, exactly what i was looking for. Thanks! the header and dp should keep me entertained until i get my intense stg 4 this summer.

 

Make sure to get the 1 3/4th version

 

And make sure to buy better hardware, dont use the junk they give you. Go 1/2" grade 8.

 

huh?

 

the bolts/washers they give you are crap. 2 sizes to small for the holes, washers are aluminum.

Go to your hardware store, get 1/2" grade 8 bolts, washers and nuts.

 

alright...that sounds good. do you have to reuse the stock header gasket? it says it comes with dp gaskets. i guess i just want to know if i'm going to have everything i need out of the box (other than the better hardware) or if i'm going to have to order other stuff.

 

You can reused the header gasket, yeah. And it comes with the gasket for the downpipe to header and catback to downpipe.

All you should need is the newer hardware.

 

my cyl airmass went from around 0.86-0.90, up to 1.08-1.12 just from the addition of the ZZP combo and tuning for it.

the gains are quite good. im very happy with it

 

Definately one of the best performance upgrades for the $$ IMO.

 

Really?? It's that much of a difference ?

 

your gains are between 0 and eleventy billion

 

bullshit.

i got eleventy billion and one.

 

p.s. your calculated airmass should have gone down.

 

how so?

im not exactly sure how airmass relates to power...but i know every time ive gained power so far its goes up a bit.

 

unless you changed pullies at the sametime.

::shrugs::

i tried to stop figuring **** out on gm's a while ago, now i just go with it

 

could very easily have been some slight tune changes i made at the time too i guess.

oh well, regardless, the zzp combo did give noticable gains

 

you might encounter the negative eleventy billion hp if your stock dp blows up, so when you put in the zzp combo you could see a huge jump from -eleventy billion to +eleventy billion. stranger things have happened.

 

Been sayin that for months

 

Great! Sounds like i'll be making a good choice for the time being. Now all i need to do is sell all my paintball gear from when i played for the University of Illinois and then i can buy my header/dp.

 

will the ZZP combo work for my 2.4??