I have had the opportunity to work with the team at JASPER Engines and at every level of this company have found that they care about their product quality, their individual shop owner-installers and their customers. This company has been around since 1942 because they are unique in that specifically. It's why they work so hard to constantly improve their products and customer service and why they spend more time trying to earn that good review. It's also why I'm writing this review. If ever there was a GOOD investment, it is JASPER who provides a nationwide 3 year | 100,000-mile parts & labor warranty on most of their products. Also, you can readily talk to someone at the company where it is impossible to do so anywhere else. They are vested in doing it right and it shows. Look at their Facebook page and see what those who use their products are saying before you make a judgement based on a few reviews here online. Then look at the company website to find out more about the product or talk to one of the many-many shops out there who install JASPER and stand firmly behind it. - That many shop owners who work on cars all day long can't be wrong. – Marion M.