Nostrum High Pressure Fuel Pump Subaru WRX 2015-2021 | H136-0571

Easy to install and seems to be working great

The Nostrum HPFP came quick. Install was a breeze, I just followed the video and was done in a little more than an hour. It works great!

Pump is super easy to install. While there is no current need other than the ability to run straight E85; I feel that this pump eliminates all worries about fuel oscillation when running ethanol with the added benefit of being “future proof”. Nostrum now offers injectors for the FA20, which will put your fueling into a safe level and will definitely pair well with this pump. I do recommend buying a factory o ring for it though as the one that comes with is much too loose fitting. All in all a great purchase.

Installation was pretty straightforward, although I will say that the replacement paper-thin o-ring that Nostrum provides is very fragile. After snapping it on installation, I had to resort to reusing the thicker OEM o-ring from the stock fuel pump. The only thing I wish I had done was wait for the price to drop $100 from when I purchased it a little less than 2 years ago, but no one could've predicted that. Very worthwhile investment for those wanting the most out of the FA20DIT motor and FlexFuel/full E85. It also goes without saying that you'll need a higher flowing LPFP like the AEM340 or DW300 or better too.

This is well worth the price if you plan on running the Cobb Flex Fuel kit. The stock HPFP has been known to lock up with high concentrations of ethanol, which limits you to around 60% and having to deal with mixing fuel at the pump. This pump allows you to fill up with pure E85 (with a proper tune) without worrying about killing the pump

it was easy to install

Such fast shipping. Just I time for my tune date. Wasn’t going to add it but then realized if I do now I’ll get in time for my flex fuel tune. Works great. IIR is the best.

I was starting to feel some hesitation in my 2015 WRX. So, I swapped my HPFP and my ignition coils. I can definitely feel a difference in the smoothness in acceleration. Installation was pretty quick and easy, probably one of the easier installs I've done on my vehicle. And now, I'll be tuning to go full e85. Can't wait!

Very limited market in this category, this was really the only after market HPFP I could find for the platform (at the time). Installed on a 2021 WRX. Installation was pretty simple, if you have TGV deletes already in place it's even easier. I do not have TGV deletes installed, so I had to lift the intake manifold up just a bit in order to gain the clearance needed for installation, wasn't an issue though. Didn't take long at all for installation.

I opted for this piece to complete my ethanol setup, it's not required for those who blend e60 if I'm not mistaken, but I wanted the option to not have to blend. Some stock pumps have trouble at higher ethanol contents, but some don't so it's a crap shoot when trying to think about it based on that figure alone. Along side that you get more overhead for your fueling, which is a nice piece of mind benefit when pushing some more timing. I will note that any gains above e60 are pretty negligible, so with that being said I would advise to keep the benefit of overhead in mind rather than gains. I've been running an average of 80-84 ethanol content daily since installation without any issues (paired with an aem340 in-tank).

The o-ring was quite flimsy on this piece, I didn't have any issues with seating the pump upon installation, but definitely watch out for that. Only that part I feel could've been done better (especially given the price point and how important this piece is for a proper installation).

I got this installed in less that 15 mins. Currently going the through the E-tuning process with Phatbotti Tuning and he has nothing negative to say.