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Must have to get the juice out of it.
Easy to install on a Opel Astra J OPC/VXR with minor modifications. It's a must have for at lease 500HP and above... the oem HP pump gave up at 480HP.

Just what I needed
I was having fueling issues which my scanner showed was due to a failing stock pump. This pump fit great and my cobalt is running amazing. The only issue I had was the stock bracket that the hotside charge pipe bolts to needed to be modified to fit over the ZZP pump. After comparing the cost of stock replacement pumps to the ZZP unit, it was an easy decision to purchase this one.

Excellent
I had a couple of trouble installing the pump but at the end what a nice upgrade on my hhr ss .thanks for all the support on ZZP crew

Definitely a need for full e85 tune.
I no longer get the P0087 or P0089 can’t remember which one. But the one that says fuel pressure to low/engine power reduced. Install was a cinch, However, make sure you have to pump in the right spot before completely bolting it on. Regardless what the instruction show you. It needs to be in a position where it clears the exhaust manifold first. Meaning that the pump needs to sit at an angle just slightly different than the instruction show you so that it clears the exhaust manifold. Then bolt it in place so you can pivot the pump where it needs to be! “Or it’s going to hit the exhaust manifold!” and you will have to chisel away at the exhaust manifold to clear it. Another option is to hopefully try no to strip the bolts to take it back out again. My bolts started to strip so I couldn’t take them back out to move the pump. I had to take a flat head screwdriver and chisel a little bit of the exhaust manifold aside to pivot the pump properly. This happened when following the instructions on positioning the pump 100%. I love it! Price is a little bit much but if you’re planning on running the E85 you know what you’re going to spend on the car.

Great quality
Awesome pump, easy to install! Great replacement for my failing factory pump.