Apexi filters are widely known as the best available on the market, well designed with excellent performance and filtration. Direct fit for Nissan RB20, RB25 and Z32 MAFs. Easily fitted to SR20DET MAF by slotting 2 mounting holes. Comes complete with gaskets and mounting bolts. 75mm intake on the filter. Any engine will benefit from being able to breathe better. The standard airbox setup filters the air well, but is designed to suppress noise and this compromises performance. This induction kit allows you to unleash that extra potential without compromising air filtration.