The TGN RedNeck Dual Stage Pre-Filter foam has been the highest recommend air filter upgrade. We have now combined the ability to use the TGN Dual Stage Pre-Filter with the popular Short Stack Foam UNI-Filter. The TGN RedNeck has been shortened to accommodate the size of the UNI-Filter but tithe the same Dual Stage protection as before. Keeps dangerous dirt, sand, dust and mud out of your engine. All serious off-readers will agree that there is no better protection than an oiled foam filter. Users must use foam filter oil for proper results (not included). Users must always test for proper movements of throttle linkage after installation. Some trimming on the outside of the filter may be required.