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              Product no.: MI608
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                Exclusive to Mace Engineering is our design-registered plenum spacer to suit Holden Ecotec 3.8L V6 engines.  
                
                  
      
      
    
                
              
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           Number of ratings: 39
        Average rating: 4.7 
        
        
        
        
          
            
              
              
                
                
                
              
            
            As advertised 10/10
            
              from Pedro on 23/11/2024
            
          
          
            This product Is as advertised, the application of the plenum spacer is very  easy and straight forward, there was enough gasket goop and it showed a improvement in the cars performance as well as no dead spot and runs smoother,, all in all a great buy and worth it
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Easy to install, mediocre gains
            
              from Anonymous on 16/09/2022
            
          
          
            product was delivered in a timely fashion, It was easy and straight forward to install. now it's left me craving more mods
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            5/5
            
              from Anonymous on 20/08/2020
            
          
          
            Easy fitment, takes about 15 minutes to do and noticed improvements almost instantly. Definitely worth buying if you're looking for good bolt on modifications, should notice it a lot more once the stroker kit and cam is put in! Really satisfied with this product
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            4/5, cheap and mildly effective mod.
            
              from Alex on 24/07/2019
            
          
          
            Easy to install, engine is running noticeably cooler/running allot smoother, paired with extractors and decent exhaust system car growls allot deeper now.  (VU series II v6)
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Works really well notice some gains from it
            
              from Anonymous on 16/09/2018
            
          
          
            
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Great
            
              from Anonymous on 23/06/2018
            
          
          
            Easy to install, felt a noticable difference down low. Will be installing manifold insulator next.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Good
            
              from Anonymous on 05/03/2018
            
          
          
            Good and easy to install, a little faster acceleration down low
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Excellent!
            
              from Anonymous on 14/09/2017
            
          
          
            Quick off the mark! and has definitely improved fuel efficiency. Good priced modification that you will notice some gains! Thank you mace engineering.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Excellent
            
              from Anonymous on 10/06/2017
            
          
          
            so simple to install. 
better launches at the lights. 
good start if your looking for cheep gains. 
would recommend.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Excellent
            
              from Anonymous on 02/06/2017
            
          
          
            Engine running smother
Noticeable increase in low down torque.
Very zippy off the mark now. Ideal for Sydney traffic conditions.
Fuel economy seems to be improving but not had the Penun installed long. 
Took less than 20 min to fit.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Excellent
            
              from Anonymous on 20/04/2017
            
          
          
            I combined the manifold insulator and the plenium spacer to my 3.8 VX commodore. A good noticable difference in low down torque  and engine appears to idle smoother. No other mods at this stage apart from K&N filter (standard airbox)
Happy enough that I purchased another set for my WH Statesman along with other performance gear.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            A worthwhile improvement
            
              from Anonymous on 17/01/2017
            
          
          
            Simple to fit for any backyard mechanic ... definite improvement in throttle response and exhaust note under load, slightly better fuel economy too (only modification so far on my V6 Ecotech)  Great product Mace!
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            5/5
            
              from Anonymous on 18/10/2016
            
          
          
            installed this at the weekend,driving to work and around ,have noticed a greater take of at traffic lights and driving around streets a lot quicker to reach speed limits thanks mace
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Worth the money
            
              from Anonymous on 07/10/2016
            
          
          
            Installed this on completely stock car and a highly modified car and both cars feel a lot smoother and better
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Great mod for the ecotec v6
            
              from Anonymous on 26/06/2015
            
          
          
            Pretty easy install have noticed gears change is a lot better and exhaust note with full extractors and 2.5 inch system high flow cat and pod intake has gotten louder and overall a very nice performance mod that keeps you car lifted nicely at a great price i would highly recommend mace to all outstanding service and support
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            worthwhile
            
              from Anonymous on 17/04/2015
            
          
          
            Already had 2.5"cat, exhaust and cold air intake. After adding 12mm plenum spacer, 69mmTB and memcal engine is more flexible and willing with better acceleration than before. The Mace parts were quick and easy to fit, online instructions were helpful.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            good with rest of my system
            
              from Anonymous on 13/10/2014
            
          
          
            goes will with the rest of my cai
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            very good
            
              from Anonymous on 06/08/2014
            
          
          
            I found after installing this great product. Easy to install, changed induction growl, produced some lower down torque and improved throttle response. Slightly cooler upper plenum chamber. A good starting point for improved performance!
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Fantastic value
            
              from Anonymous on 30/06/2014
            
          
          
            Fitted this along with the 12mm inlet manifold spacer, now has pick up very similar if not better than my cammed and tuned V8!! Fuel consumption dropped around .5L per 100km on first tank alone.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Very good
            
              from Anonymous on 02/11/2013
            
          
          
            Very simple to put on very happy
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Can't wait to try other products
            
              from Anonymous on 17/05/2013
            
          
          
            Simple and No fuss fitment.Noticeable increase more responsive.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            great
            
              from Anonymous on 06/04/2013
            
          
          
            Gave my car more pick up down low.. very happy
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Simple but so effective.
            
              from Anonymous on 11/12/2012
            
          
          
            Takes less than 10mins to install. Noticeable power gains by itself, but more with other add ons.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            4 stars the product works well
            
              from Anonymous on 23/11/2012
            
          
          
            easy to fit and works really well with a k&n filter and that spacer I now have more air flow for my motor and if u got a 6speed gear box and lsd at the rear wheels wicked fun guys :) next I,m buying from mace is a cam and more to come
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            AAA
            
              from Anonymous on 02/11/2012
            
          
          
            Easy to install, great product and noticeable power increase. Thanks!!!
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            simple installation and good results
            
              from Anonymous on 10/09/2012
            
          
          
            
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Quality product
            
              from Anonymous on 04/09/2012
            
          
          
            
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Great
            
              from Anonymous on 05/08/2012
            
          
          
            Better and cooler air thumbs up.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            verry good
            
              from Anonymous on 29/07/2012
            
          
          
            Very easy to install in my vx engine and noticeable power when at high revs. thanks mace
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            great product
            
              from Anonymous on 18/07/2012
            
          
          
            great product, good performance gains, easy fitment, improved throttle responce
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            AAA+++
            
              from Anonymous on 11/07/2012
            
          
          
            Easy to instal,fast delivery,noticable power gain,well worth it,thnx Mace.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            works good with suporting mods
            
              from Anonymous on 21/05/2012
            
          
          
            good product works good with suporting mods :)
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Great Product! Noticeable Power Gain! Easy To Install!
            
              from Anonymous on 17/04/2012
            
          
          
            
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Very highly
            
              from Anonymous on 19/03/2012
            
          
          
            Great product easy install. Good performance gains and extremely fast postage! Look forward to dealing with mace in future. My computer wigged out on me a bit today with the airbag alarm coming on. I'm sure this isn't a problem but will tune down the track
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Very good
            
              from Anonymous on 16/01/2012
            
          
          
            Installed this into my 2003 VY manual, with extractors, hi flow exhaust, CAI, titanium plugs, bigger leads. Suppleid promptly, easy to install (it would have been nice to have instructions included). Waiting to test the performance on a longer drive.
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Great delivery time the next day! can feel the gains immediatly after the spacer is in!!
            
              from Anonymous on 20/12/2011
            
          
          
            
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Excellent a must have !!
            
              from Anonymous on 28/11/2011
            
          
          
            Plenum cover is cool to the touch and much smother idle and throtle response! another awsome product from Mace!! Cant wait to save some bucks for a few more trick bits!
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            very good
            
              from Anonymous on 18/11/2011
            
          
          
            My VX Equipe , with the other mods to the the induction system , now goes like a cut cat , I am also fitting a sports exhaust , in a few days . It does not take much to make the ecotech howl .
          
         
        
        
        
          
            
              
              
                
                
                
              
            
            Top shelf product! definitely recommended
            
              from Anonymous on 20/09/2011
            
          
          
            i can now actually touch the plenum without getting burnt! couldn't belive it. Im very impressed with all of my mace products! my vs ute has gone from mild to wild with their goodies. Easy to fit and noticeably smoother idle and throttle response straight away. Fuel economy has improved aswell. THANKS GUYS :)