I haven't used the spacer you are talking about but have read some reviews since I have been looking at the TB bore/spacer upgrade for when I do my intake upgrade.. They all said it was a good product, but the only thing is, if you don't bore the lower half of your stock TB from the butterfly down to 60mm, the opening is only 58mm stock... so you will have 2mm of useless space with your TB spacer.. so if you can, I would take your stock or another stock TB to a machine shop, and have them bore out the TB to 60mm, from the bottom of the butterfly down... and then get the spacer and install them on your intake...