I just had my header installed and honestly im not to impressed. It feels like i lost some horse power. The cars feels smoother thru out the rpm. Anybody have any headers installed on their 2.4

 

You may have lost power on the low end but gained in the upper.

 

Have you done anything else to the exhaust? You might be feeling the lose of tq. Anyways, keep us posted as we are interested. And this is the GMPP header correct? A few of us were wondering if it would fit.

 

you should do a 0-60 run and check out the 1/4 mile

 

its winter time right now so a quarter mile is out of the question. I have gm headers, injen intake and a greddy muffler. overall my best modd was the intake. I might have to get a bigger exhaust to notice more of diff.

 

who installed it? Any problems keeping warranty?

This is something I have thought of doing (GM Header, GM exhaust and an injen intake) but nothing until late spring. I want to get some better baseline times first.

 

I wonder what kind of HP the GM header will give.

 

they said it didnt void warranty. it might not of felt to much diff because i might need a bigger exhaust. The injen intake is worth it i felt a huge diff.