The Injen 1037BLK is a black Hydroshield pre-filter, a sleeve that fits over the outside of a conical intake filter and catches water and coarse debris before they reach the filter media. Injen's Hydroshield is constructed from a proprietary base media and then treated with a hydrophobic water-repellent. Per the manufacturer, the material is UV resistant and puncture resistant, and it stops particles down to .005". The manufacturer also describes it as elastic, so it returns to its original shape after servicing.
The case for this part over running a bare filter is protection plus easier maintenance. The hydrophobic finish helps shed moisture, and it is water repellent, not waterproof, so it reduces wet-weather intake contamination without replacing a proper water separator. Paired with an oil-free SuperNano-Web dry filter, it guards a filter that is 100% cleanable with a light blast of compressed air and requires no oil, helping keep the MAF sensor free of oil contamination. Owners running cold air intakes in rain, road spray, or dusty conditions will find this the cheapest way to extend time between filter cleanings.
Fitment is the key buying question. The manufacturer lists this pre-filter for the X-1021, and X-1026 air filters, and its 6 in base and 6-7/8 in height line up with the X-1021 filter's footprint. Search terms enthusiasts use include Injen 1037BLK hydroshield, X-1021 pre-filter, X-1026 water repellent pre-filter, and black hydrophobic pre-filter for SuperNano-Web. Confirm your intake's filter size before ordering, because the sleeve is sized to the filter rather than to a vehicle year, make, and model.
The manufacturer confirms fitment on the Injen X-1021 and X-1026 air filters. Confirm your filter's size before ordering.
No. The manufacturer describes the hydrophobic treatment as helping to repel water, but it does not make the filter waterproof.
The manufacturer describes the material as elastic and designed to return to its original shape and position after servicing, which supports reinstalling it after cleaning.
