When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Either or. It is just prefferance. I ran a cheap manual with my stock turbo setup then switched to an AEM truboost EBC when I upgraded to the 50trim kit setup. EBC is easier to change settings and adjust.