ok, question for you guys and gals. what is a plenum spacer and what does it do exactly? is it a worthwhile investment?

 

go read motordyne's site

 

^^^
+1
motordyneengineering.com
-GP-

 

just to add my 2 cents, but the Motordyne spacer was the best MOd for the money I have done yet, not that I have done alot but I think as far as N/A mods go this woul dha veto be at the top of the list.
and I only got he 5/16 to keep the engine cover, some of these guys with the 1/2 in spacer prob. seen even better gains

 

check the web site and call them and ask questions. They are very helpful. I have it and it seems great. I can def. feel the diference when I am on the freeway. pushes a lot more over 3 to 3.5 rpm. great buy. good luck.

 

The MotorDyne plenum spacer raises the top collector . . . Thus allowing more air into the intake. This is especially true for the 2 front intakes. This is a very worthwhile mod.