Intake manifold cover
Thread Starter
Safety Car
Joined: Aug 2017
Posts: 4,243
Likes: 1,133
From: North Myrtle Beach SC
Intake manifold cover
I sent my LS3 intake to GPI for their rod mod. I never understood why there was a cover on these intakes from the factory. Assuming it is to keep down intake noise, but it also would tend to keep heat in too. Anybody removed theirs? Made more noise?
Le Mans Master
Joined: Dec 2005
Posts: 7,002
Likes: 1,687
From: Southeast TX
I kinda like engine noises. I did the same to mine as you're doing. Didn't notice anything because I did cam, ported and milled heads, intake porting, headers, exhaust all at the same time. It made all kinds of glorious noises after all that.
Le Mans Master
Joined: Oct 2000
Posts: 6,516
Likes: 730
From: Sausalito CA
Say, OP you are writing about the intake manifold cover.
As I recall both the LS2 & LS3 have valve cover/ coil pack plastic shields.
An entire Intake cover may be aftermarket or accessory.
For my LS2, yes I operate without the plastic valve cover panels and any increased noise is negligible.
(I removed for the same reason, heat retention)
I have seen no long-term issues and have operated w/o covers for a decade.
Happy holidays
As I recall both the LS2 & LS3 have valve cover/ coil pack plastic shields.
An entire Intake cover may be aftermarket or accessory.
For my LS2, yes I operate without the plastic valve cover panels and any increased noise is negligible.
(I removed for the same reason, heat retention)
I have seen no long-term issues and have operated w/o covers for a decade.
Happy holidays
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Mine came off about 10 years ago. Most people don't know it even exists, including me, until discovering it when removing the manifold to be ported.
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Advanced
Joined: Jul 2016
Posts: 86
Likes: 4
From: Utah
Removed mine ages ago, didnt notice any change in sound... but then I also have longtubes, xpipe etc. Definitely have less heat soak without it though. I think its there to quiet valve train noise, but meh.