Plenum spacers on sv6 ve

[Alex357]

Hi i own a 2011 sv6 ve sedan with no engine mods just visual mods. I was wondering if plenum spaces make any difference to performance (add Hp torque) or increase fuel economy.
Was looking at this 6.35mm Mace plenum spacer and wanted to know if its worth the money.

The link to the item
https://www.maceengineering.com.au/epages/shop.mobile/en_AU/?ObjectPath=/Shops/mace/Products/MI630

 

[MYVESSV8]

have heard positive results about their spacers, it wont be ball tearing improvements, but supposed to help with a bit of hp and klm/100 give them a call