Has anyone installed Headers on a HHR
Thread Starter
Senior Member
Joined: 07-21-2006
Posts: 210
From: SoCal
Has anyone installed Headers on a HHR
I was thinking of geting a header and hoping that someone could point me in the right direction I was looking at this one http://www.shiny-hiney.com/header.html if any one has a header let me know.
God Bless!
Rick Johnson
God Bless!
Rick Johnson
Senior Member
Joined: 10-02-2005
Posts: 1,245
From: VA
That looks like the same header from Cobalt Addiction.
Like many "claimed" gains, don't expect much.
As for the coolant pipe that crosses on the back side of the block, if that is a problem, there is an O-ring connection at each end. A strong grip and it can be rotated some.
Actually in dyno tests with another manufacturer, the factory manifold is not that bad at all, a much better design that manifolds of old!
GM has what is called an "extrude honed" manifold available, where they pump an abrasive putty-like substance through it to smooth and enlarge the passages.
The 2.4 exhaust system is pretty well designed from the factory and difficult to improve upon. The much heralded IMCO muffler is actually more restrictive than the stock muffler, which will result in a slight, but hard to notice, power loss. It may offer a "better" sound to some, but sound does not = HP.
Without going into serious internal engine mods, your best "bang for the buck" would be a good ECM tune.
Like many "claimed" gains, don't expect much.
As for the coolant pipe that crosses on the back side of the block, if that is a problem, there is an O-ring connection at each end. A strong grip and it can be rotated some.
Actually in dyno tests with another manufacturer, the factory manifold is not that bad at all, a much better design that manifolds of old!
GM has what is called an "extrude honed" manifold available, where they pump an abrasive putty-like substance through it to smooth and enlarge the passages.
The 2.4 exhaust system is pretty well designed from the factory and difficult to improve upon. The much heralded IMCO muffler is actually more restrictive than the stock muffler, which will result in a slight, but hard to notice, power loss. It may offer a "better" sound to some, but sound does not = HP.
Without going into serious internal engine mods, your best "bang for the buck" would be a good ECM tune.
Senior Member
Joined: 12-21-2005
Posts: 1,010
From: Launch Coast Calif.
I was thinking of geting a header and hoping that someone could point me in the right direction I was looking at this one http://www.shiny-hiney.com/header.html if any one has a header let me know.
God Bless!
Rick Johnson
God Bless!
Rick Johnson
Senior Member
Joined: 07-17-2006
Posts: 520
From: Beyond the Sun....
Member
Joined: 01-04-2007
Posts: 47
From: Tucson, Az.
Hello. Just wanted to add. I have the Cobalt Addiction header and down pipe. I think they're great pieces and bolted right up. No prob. I noticed a good gain from them. But as a suggestion. If you start to mod the intake and exhaust, you will start to lean out on the top end. I would suggest a tune and SS/SC Injectors. When we tuned my car, we noticed that with an intake and muffler, it had slight knock n injector duty cycle was high.
Just some info.
Just some info.
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