Hey guys I was just wondering if any of you have had the extrude gmpp exhaust manifold put on and if there were any noticable increase in power and if not what kind of headers are you guys using and what in your opinion is the best out for our car? And one more question when you guys removed the cat on your exhaust did you just have it replaced with 2.5 inch piping or what?

 

I have heard the gains are minimal and it just looks like a pain in the **** to install.

 

A member on here, "cracked" has it. PM him, as he doesn't post often.

 

As far as I know if you remove the catt the computer will go in to limp home mode and your power will got shiat! And the computer dose such an invasive test on the O2 senser that an O2 sim will not work.
So in short if you remove the catt the car will run like crap!

As for the header I have no clue I dont have one yet.

Later

 

Personally i would wait for a true header vs a manifold.

 

Im Getting 1 along with stage 2 kit & GM Performance exhaust >> SO I will Let U know in couple of weeks when all parts get here already paid for them just waiting for stage kit !

 

are you going to dyno after install?

 

Dyno numbers

 

the car will not go into limp mode i have my cat gutted for about 3 weeks know,no limp mode the only thing you will have is a check engine light on. and i have 2 1/2 to a flowmaster on my car the car really screams with the intense kit.

 

Rob has a cat delete. He is pushing 270 whp with the Intense Stage 3.