All Deatschwerks high flow fuel injectors are built using only quality OEM cores. In addition, each set is balanced to within a 2% flow variation. For our customers, this means better fitment, easier tuning, and increased reliability. All injectors are backed with a comprehensive 12-month warranty. Most aftermarket injectors go straight from the production line to the shipping department. At Deatschwerks, we have added what we consider a crucial step of flow balancing and quality assurance testing on EVERY set of injectors we produce - not just one or two from each lot. Over 40 data points are collected and analyzed on each injector to be sure our customers only receive the best end product. All of our testing is performed in-house on our custom built New Age Technologies injector flow bench. Deatschwerks injectors are DIRECT FACTORY REPLACEMENTS for their listed applications. In addition, we offer a comprehensive line of universal injectors which are available for customers who's applications are not listed in our catalog. Our Universal applications include high impedance, low impedance, narrow body, wide body, and several different connector options.