I really did not think they did A lot around the bigport and smallport? I'd a S/T 20v as soon as that hated life when it had been disconnected.. So I have modified all of them and the vibrations are a little bit much less as well as engine feels https://toyota-4age72603.blogolize.com/the-best-side-of-blacktop-4age-for-sale-70599158