Bought my Z about a month ago and was wondering if i have a plenum spacer? I measured it and it looks like its about 5/16. Which means its hopefully the MD spacer.. Here is a pic for reference

 

Yes you do

 

Looks just like mine.

 

yup, u sure do.
not sure how you can tell what brand it is tho

 

well i measured it with a tape measure and the spacer part was 5/16

 

but anyways awesome to know! i was just about to buy a MD spacer too... lol guess ill spend that money on test pipes

 

im talking brand, i knw its a 5/16...but md isnt the only brand that does 5/16, thats all i was saying.

 

ohh yea true

 

Take the plenum off and see if there is a brand stamp on it?

 

i wouldnt do it just to find out the brand, if your idle is good etc..and the motor runs well...dont fk w/ it....jus my opinion. leave her alone and roll w/ it...

 

looks like a MD to me. and it's not that hard to take off the plenum just be careful around the TB.

 

You're lucky! I wish my G came with a 5/16 when I purchased it!

 

pretty sure MD plenum spacer has no "brand" stamp on it. but I can tell you that is def a MD spacer. b/c it is! lol

 

Test pipes are a good idea, unless you have to do inspection/emissions. If so, HFCs are a better route. I've got both in stock

 

looks exactly like my MD 5/16...

 

doesnt matter what brand. none are bad really.
Its the most basic rudimentary part man could machine up and sell.
ENjoy it and foget about it.

 

Its a spacer alright.
Man,clean up that plenum.Looks nasty...
Not running a strut bar?

 

Your Z came pretty modded, lucky you!

 

Since you don't know the real brand, you can just tell yourself it's your favorite one and be extra happy with it. Doesn't matter anyway, they are all mostly the same from brand to brand. I want to get one soon, going to go with the same one you have.

 

Ha what do you know you did get more than you bargained for.

Now go under the car and see if your exhaust system is a MD too LOL