Gm Extrude Honed Manifold
#1
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Gm Extrude Honed Manifold
ok gm's manifold for our cars is a joke....side by side there is no difference...performance division said there is a difference that is not noticable by the naked eye...DONT BUY THIS...
#5
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yeah, the reason it's still a cast part is threefold... it fits perfectly, it still keeps the heat in so that it warms the cat fast and it's more durable than a tube style...
the extra cost is in the honing, it smooths out the flow quite a bit. i've heard good things from 2.2, 2.4 and 2.0SC owners.
the extra cost is in the honing, it smooths out the flow quite a bit. i've heard good things from 2.2, 2.4 and 2.0SC owners.
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I didnt notice a difference between the two... and the guys at gm performance have received multiple calls today asking what the difference is....i will try it i hope it does help a bit...thank you all maybe got angry before i drove it
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Originally Posted by lssport04
ok gm's manifold for our cars is a joke....side by side there is no difference...performance division said there is a difference that is not noticable by the naked eye...DONT BUY THIS...
#11
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I heard from a source that it was tested by a company other than GM against aftermarket headers and provided equal HP gain.
I don't have any details but the source it came from was reliable.
Keep in mind that it is the identical manifold but polished so no worries about fit etc.
I don't have any details but the source it came from was reliable.
Keep in mind that it is the identical manifold but polished so no worries about fit etc.
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Originally Posted by lssport04
i will find out on the way home^^^final answer tonight
#15
This is why im thinking of just sticking with the manifold. It will last longer and gains are within roughly 1 or 2 hp of each other. To me manifold is probly the best. If I dont go this route tho, ill go with CA Header
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if/when I buy it I wanna keep it off the car to polish the outside as well maybe do a high heat powder coat if possible. If the aftermarket aint doing all that much better there is really no reason to go with one.
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Originally Posted by lssport04
ok gm's manifold for our cars is a joke....side by side there is no difference...performance division said there is a difference that is not noticable by the naked eye...DONT BUY THIS...
#19
I bought one. And there is a differnce that is noticeable on the manifold. its smooth on the inside and not all rough. Performance i didnt really notice but i also need to get it tuned.
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Glad you got one Carlos! Now we need to work on the airbox mod this weekend!
I had the manifold on my 2.4... it wasn't a huge difference with the NA engine... but you could tell there was something done.
I'd say 5 hp gain...
I had the manifold on my 2.4... it wasn't a huge difference with the NA engine... but you could tell there was something done.
I'd say 5 hp gain...
#23
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Originally Posted by AlphaJaguar5
This coming from a kid that bought the GMPP exhuast. If all your gonna say is "some people thing cucumber taste better pickle" and run away with nothing but retardation to back it up then your an idiot, and please stop talking.
#24
Originally Posted by OniMirage
if/when I buy it I wanna keep it off the car to polish the outside as well maybe do a high heat powder coat if possible. If the aftermarket aint doing all that much better there is really no reason to go with one.
That sounds like a good idea. I may try something like that with mine.
#25
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Originally Posted by lssport04
yes there was a noticeable difference driving....i retract my statement...and by looking at it there wasnt much difference in my opinion...