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.
The only way to be 100% sure that its never been tampered with is to open it up.You can also take the rocker cover off and there is lines on the cams and depending where the line are will tell you if it uk, wrx or sti heads....