It’s no secret that at GrimmSpeed, we rely heavily on input from you, our users. We do this from the time as we’re deciding which projects to tackle next, throughout the design process and even after production. This is one of those times when honest feedback from our customers, tuners and retailers has helped us improve upon a product and we’re not afraid to admit it!
To be perfectly clear, the performance of the intake for the 2015+ WRX hasn’t changed one bit, but we have made a modification that will prevent users from installing the filter onto the intake tube incorrectly, which has lead to some unpredictable performance. We’ve covered proper installation in our installation guide, but sometimes, the task seems so straight forward that people skip the guide all together. We get it – we’ve done it too.
The installation calls for the filter to be installed onto the intake tube only 1″ from the end – not bottomed out on the MAF flange. If the filter is bottomed out on the flange, the tube will protrude (slightly) into the filter and adversely affect the function of the velocity stack that’s built into the filter (see below).
After our initial group buy customers began getting their tune on, a few tuners were reporting strange readings and got in touch with us. Collectively, we decided that since it’s not always possible for a tuner to inspect the car that they’re tuning physically, it would be best for us to take action to try and prevent such installation errors. The result is the updated MAF flange that you see below. This flange will prevent the filter from being installed too deep onto the tube.
We strive to provide the best possible products that we can and on rare occasions, sometimes it takes a larger number of normal users to understand just exactly what’s needed from a product. In this case, we were more than happy to revise our design! We still have a small batch of intakes in stock with the RevA flanges, but once those are gone, these RevB flanged intakes will be on the shelves and ready to rock!