I purchased four of these injectors to replace all of the driver side injectors instead of just the one that was failing with a 20% fathers day discount. The parts were shipped the same day with tracking number, arrived in two days and I am out of province. The parts were well packed came with a receipt, shipping label for core return, a DPC T-Shirt and a kit kat candy bar. The parts were replaced and worked perfectly in my truck. Upon sending the injectors back for core return I noticed that the return label was for Purolator and I would have to drive 60 miles just to send these back. Called DPC talked to Jarred and he sent me a Canada Post shipping label within minutes of calling him. Sent the parts back and got my core return in four days including shipping time. Now its hard to beat that kind of service and I will repeat " Great parts and great service"! In closing I can tell you to buy with confidence.