Alright, my father is trying to tell me that I don't have enough money for the header because they have to take the engine out of the car to put the thing on, and he wants proof.

So, do you have to take the engine out to put on the GM Extruded Honed Manifold? And about how long does it take to put it on?

By the way, I have a 2005, 2.2L LS

 

absolutely false I did mine in about two hours on my SS

 

I installed my GMPP extrude honed manifold in less than an hour. You will most likely have a difficult time with the three nuts holding the downpipe on due to corrosion so buy three new studs and nuts too.

But then you live with your dad and he pays the bills right? In that case you have to pull the engine

 

Thanks guys, I appreciate it.

More people say something!

I'll be showing him this thread after a few more replies.

This applies to anyone with any header on our cars!

 

I have never done it myself but we do it at work all the time and I have yet to see they pull an engine for the install. No biggie, buy the extruded honed manifold and the install kit we offer and you will have everything you need except the the labor.

Exhaust Manifold (btw it happens to be onsale)

Install Kit

Enjoy.

 

Okay, thanks! I am showing him all this right now. He is retracting his statement and he finally realizes I know what I'm talking about, as this is like the 5th time I've proven him wrong. And your stuff is the stuff that I was going from. Showed it to them as its on sale and ebcause you give great descriptions. I'm trying to get the headers, the kit, and the CAI. (Question, do you need to order the filter when you buy the CAI? or does the CAI kit come with one?)

 

Cai's come with a filter, all of them do

 

yes this is true, the CAI does come with its own filter.

 

Okay, thanks.

People with headers (ANY HEADERS) post install times, and did you have to take out the engine. Just more proof for my dad!

 

You don't need anymore posts. Nobody took their engine out to install a header. Trust me. It is helpful to have a lift however. Some of the bolts are accessed from below.

 

and its not a header


its still a manifold

 

Also, header. Unless we went to dual sided, 2 on each... lol

 

Thanks a bunch. I knew you didn't need to take it out, just trying to get more proof for him.


Which, is a header. You repeated yourself dude. "Its not a header....its still a header"

 

lol no its not, its an extruded and honed MANIFOLD, a "header" is a different type of manifold; it is made of separate equal-length tubes.

 

Will Fit Chevy Cobalt with 2.2L L61, 2.0 L LSJ Supercharged, or 2.4L VVT LE5 . Extrude Honed Exhaust Manifold Works with both production and GMPP exhaust systems. This is the Factory Header Professionally extrude honed by GMPP with the part number ending in 1972. GMP states that these headers have a 30 CFM Flow gain over the stock manifolds. This Gain comes from increased port sizes and is more efficient as many of the casting imperfections are removed and smoothed out for increased flow. Item will not void GM warranty.

^^ Taken from Cobalt Addiction.

I was under the impressions that they were all equal length tubes. And the Cobalt Addiction header looks pretty similar to this one, yet its classified as a header.

 

has anyone seen any significant gains with this manifold?

is it just a ported factory manifold?

 

basically a ported manifold

 

why in the hell would you need to remove the engine to install a header/exhaust manifold?

get under the car and you can see exactly what needs to be done.

 

wait, so is there no power gains with this part?

 

Nope.. it bolts on. look at your car, there is plenty of room to get that out of there w/o taking the engine out.

Header install How-To

Cat-back exhaust install How-To


You will see a gain from the GMPP manifold, because the inside of it is
smoother (than stock). Air will flow across the surface more easily.

I think what that guy was suggesting is that you won't see as much of a gain vs. a header with larger tubing.

 

I didn't dyno before and after, but I had the GMPP Touring exhaust on for a while, then added the extrude-honed manifold and I think it revs a bit more freely. Interestingly my mileage is down 1 MPG or so, indicating that I'm either driving it harder or the computer is running more fuel based on the O2 sensor and better flow (and more fuel, as long as the AFTRdoesn't go too rich, means more HP).

 

The gains on a 2.2 or 2.4 with the extrude-honed manifold are going to be very minimal. Honestly 30 CFM ain't much... but it will make like a 5hp difference on the SS/SC because of the forced induction.

The only reason people are getting this manifold is really the warranty. I've heard too many horror stories about other true "headers" to bother with them.

 

better get a down pipe if you are going past stage 2 though. that stock flex pipe is weak

 

He does not have an LSJ engine.

 

The extrude-honed manifold will provide a performance increase over the stock 05-06 2.2L manifold. This is not just due to the honing out process but rather the entire passage way is larger. Where the 2.2L O2 sensor mounts, the stock 2.2L manifold has a small "D" shaped exit hole (less then 2" diameter); whereas the extrude-honed manifold (and stock 2.0L manifold) has a larger round exit hole (2.25").