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Old 01-10-2002, 08:37 PM   #1
Scooby Newbie
Member#: 5841
Join Date: Apr 2001
Location: Concord, North Carolina, USA
2002 WRX

Default How bad is it to leave out the exhaust manifold heat shields?

i am in the process of changing my uppipe, tomorrow is put everything back on(i ran out of daylight. right now i can put the heat shields back on, but do i have to??? what are the cons of this procedure? is there something that i have overlooked as to why they NEED to go back on? thanks, Brian Matta
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Old 01-10-2002, 09:09 PM   #2
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
2002 WRX Sedan
Midnight Black


Just be careful not to drip any oil on the unshielded exhaust manifolds. Those cast iron suckers get HOT. Good way to start an engine fire.

The SS of the up-pipe keeps it significantly cooler, but I'd at least think about putting the shielding back on the manifolds.

Last edited by Concillian; 01-11-2002 at 12:47 AM.
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Old 01-10-2002, 09:09 PM   #3
Scooby Specialist
Member#: 4229
Join Date: Feb 2001
Location: Dublin, OH, USA
2003 S2000
Did someone say track day


basically you don't really need to since there won't be a cat there which is what really heats things up in the first place. SUS has pretty good heat rejection properties.
ellisnc is offline   Reply With Quote
Old 01-10-2002, 09:26 PM   #4
Scooby Newbie
Member#: 11588
Join Date: Oct 2001
Chapter/Region: MWSOC
Location: Carol Stream
2007 335


I chanegd my uppipe a while ago ( haha have fun ) and I have been lazy enough to put bak any heat shells that I have removed ( excpet the turbo ones) and my car is running just fine. just to share with you. oh if u decided not putting back heat shells, make sure you cover the holes on the headers. ( or your car will be smoking out front! )
good luck !
slin02 is offline   Reply With Quote
Old 01-10-2002, 11:30 PM   #5
Scooby Specialist
Member#: 8635
Join Date: Jul 2001
Location: Texas
04 STI, 07 FXT


I took all mine off and left it that way. It is easier to work on it in the future. I can't believe it would matter. The exhaust is more exposed and could heat up surrounding hardware but with the uppipe out and all I figure we should be okay.

I hope so anyway.

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