Hallman PRO-PU Boost Controller, Purple

I installed this in my 1997 Volvo 850R.I set the boost at a conservative 10.5 PSI. This thing is really accurate. You just set the boost you want and forget about it. It doesn't go 0.1 PSI more than my set 10.5 PSI. I don't really have to worry about over-boosting or anything.Now, this may just be a characteristic of Volvo 850's, but I had to drive a little more conservatively in the lower RPM'S. This boost controller really allows boost to build early and on my car that risks bending the rods. So I had to learn not to get on it too hard below 3K RPM but when my car is in sport mode that's not really a problem since the RPM's build up fast enough. This is no fault of the boost controller and is just a characteristic of most manual boost controllers. In fact, Hallman warns you of this phenomenon in the instructions.Overall I'm really happy with my purchase. I feel the car is boosting way more accurately and I know I can turn up the boost with more supporting mods. I highly recommend this boost controller. There are also many car forums ranging from Subaru, Mitsubishi, and Volvo that highly recommend this model.

Seller did not disclose anodizing defects on product exterior.Defects are cosmetic, but the Seller should have disclosed this information in the sales ad. I would not have purchased this item from this Seller had I known beforehand that the anodizing was defective. Because of the undisclosed defects, I do not trust this Seller and would not buy from them again.