The JWT cams are a great product for the 04-06 years, but in 07 VVT was introduced to the VK56. Offering a product for a limited number of outdated Titans is kind of foolish IMO. I wish stillen would concentrate more on their VK PRO, so it would offer a selectable tuning range for 87-93 octane and cover all years of Titan production. I'm not flaming, just throwing out my opinion.