I have searched and searched on here for something on this topic. There are lot of blogs both negative and positive and, from what I gather, it depends on the vehicle. Has anyone added a throttle body spacer to their R51? Specifically the 2012? I have a CAI and love it but I am looking to increase HP for towing and, well, just plain ol' fun when driving.
Additionally, has anyone upgraded their intake manifold and throttle body? Was there a major difference in performance?
I'd love any info I can get on this.