Originally Posted by JimC
Other than your lighter wallet it won't do anything for the car. This isn't like the old carburetor set ups where you put a spacer on to increase runner length to change the power band.
People who say it made a change are justifying the purchase. No one who says that has ever done a baseline dyno without the spacer and then put the spacer on and seen an increase in power.
Save your money.
My buddy with the SC had two different dyno tunes!.. One before and one after!.. About a 15hp difference!.. The do help but the only time you will see a noticeable difference is in a FI setup!..