I bought their stage 2 intercooler, LIM, fuel rails, etc. and my experience with them wasn't too good. It took them over 5 weeks to ship it out, and they never sent shipping information. Then they wanted to give me a hard time about returning my cores outside their 90 day period, despite the fact it was only 8 weeks since I had recieved the products.
Wasn't super happy with the intercooler system either, it was missing a lot of little things here and there you would expect to come in a kit of this nature, instructions were terrible and straight up asked you to zip-tie things. The heater hoses they gave didn't even match the intercooler inlet and outlet. Then the fuel rails were also kinked pretty bad in one of the bends, but somehow nobody noticed it even through the powdercoating process. Needed to weld a new bracket for the MAP sensor onto the fuel rails as well. Also bought a set of spark plug wires once and three were pierced and arcing out of the box.
That said, the products aren't really bad, the intercooler core, heat exchanger, LIM, and fuel rails look nice and seem to work well. But you'd probably be better off piecing together your own intercooler system if you could. Unfortunately it's hard to find some things such as the fuel rails elsewhere, but now whenever I can I try to avoid ZZP.
