Plenum Spacer?
#1
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Join Date: Sep 2016
Location: Georgia
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Plenum Spacer?
So I've had my Z for about a year now and I just noticed this while I was changing my spark plugs. It looks as if the previous owner of the z installed a Plenum Spacer. I'm curious as in if it's an aftermarket one or oem one that comes with the 03 performance model Z. I haven't heard of any plenum spacer's coming straight out of the factory already installed on the Z so it might be an aftermarket one. It's not as big as a motordyne one I was looking into but then again it's still a spacer. One less bolt-on I have to buy ig even tho I'll buy the Motordyne 5/16" Iso Thermal Spacer later on lol. What do ya think, I might get flamed on this thread but screw it
#2
350Z/370Z Tech Moderator
MY350Z.COM
MY350Z.COM
So I've had my Z for about a year now and I just noticed this while I was changing my spark plugs. It looks as if the previous owner of the z installed a Plenum Spacer. I'm curious as in if it's an aftermarket one or oem one that comes with the 03 performance model Z. I haven't heard of any plenum spacer's coming straight out of the factory already installed on the Z so it might be an aftermarket one. It's not as big as a motordyne one I was looking into but then again it's still a spacer. One less bolt-on I have to buy ig even tho I'll buy the Motordyne 5/16" Iso Thermal Spacer later on lol. What do ya think, I might get flamed on this thread but screw it
Therefore: aftermarket plenum spacer.
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#8
Registered User
since we are all talking about the plenum spacer , i don't mean to thread jack but don't want to start another.. can they be reused? as in i have to replace my valve cover gasket and have to remove it..
#10
Registered User
What thickness is the better option? I have seen 5/16, 1/2, and 5/8. I understand that raising the upper plenum with the spacer, that the cross member height will have to be adjusted. I am wanting to do this upgrade, but trying to evaluate which thickness is the better option without deleting the cross member.
#11
Registered User
To the above. 5/16 hands down is the best plenum for daily driver and performance. It's been debated in the past and that size became the majority winner.
To the one replacing the valve cover gaskets. If you are going with a spacer It's best to go ahead and do the plenum while your whole intake is out of the car anyway if budget allows. I decided to do a full wire tuck when I did my gaskets and clean the engine real good. My 03's engine looks like it came off the assembly line a year ago now.
To the one replacing the valve cover gaskets. If you are going with a spacer It's best to go ahead and do the plenum while your whole intake is out of the car anyway if budget allows. I decided to do a full wire tuck when I did my gaskets and clean the engine real good. My 03's engine looks like it came off the assembly line a year ago now.