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snicker
06-12-2009, 08:57 AM
Are the exhaust manifolds' on the STI any better than the exhaust manifolds' on the WRX? I was given an STi set and before I swap them I was wondering if it's worth it or not.
409industries
06-12-2009, 03:06 PM
Are the exhaust manifolds' on the STI any better than the exhaust manifolds' on the WRX? I was given an STi set and before I swap them I was wondering if it's worth it or not.

Send them off to Grimmspeed to get PnP'd and ceramic coated. I will vouch for the fact that they rule after getting this treatment (quicker spool and look totally stock).

As for the WRX / STi comparison, i am not sure how much of an improvement they are... can you even directly swap them? I'd be interested to know this as well since i am not sure if the USDM 2.0 and 2.5 motors have the same design where the exhaust manifolds bolt up.
MConte05
06-12-2009, 03:08 PM
There is no difference, they are both created the same with a crappy casting process. If you really want to see a difference, get them P&P'ed like Aaron said. Could also send them off to me, as I do P&P as well. Just sold my set of Headers the other day. ;)
lorenkb
06-12-2009, 05:52 PM
Are the exhaust manifolds' on the STI any better than the exhaust manifolds' on the WRX? I was given an STi set and before I swap them I was wondering if it's worth it or not.

It depends on the year. The 04+ STi exhaust manifolds are the exact same as the 02-05 WRX exhaust manifolds. The 06+ WRX exhaust manifolds are narrower with different bends. If you are going to have a set ported and polished, go with the STi/older WRX ones.
GodSquadMandrake
06-12-2009, 11:31 PM
The JDM legacy ones are better. Someone had a pic in the parts shed. Smoother bends, bigger ID
snicker
06-13-2009, 06:59 AM
thanks guys
GodSquadMandrake
06-13-2009, 11:39 AM
http://www.god-squad.net/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=4675&g2_serialNumber=1
http://www.god-squad.net/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=4677&g2_serialNumber=1
pcowan
07-08-2009, 06:47 PM
There's also some clearance issue for the oil filter. Apparently WRX headers will interfere with STi oil filters.
--pete