I have a set of DDP4's that have just been refreshed by Weston 2k miles ago... they run great, and are still in the truck if you want a ride... Moving to a larger set. went to a larger primary. They run great, and are a predictable injector to tune. Limited idle haze, no real lope to note. Looking for $700 shipped to your door without core $600 with core. I am located in Pa 18966