4.0” (89) OD/ 3.75 ID (95mm) MAF Housing x 6”(152mm) length with air straightener; fits Audi, VW, Seat, Skoda, Opel, Vauxhall, Citroen, Nissan, Porsche, Volvo, Fiat, Hyundai, Land Rover, Mercedes-Benz, Ferrari & BWM (see list of MAF sensors that fit below) · Use on your cold-air intake, turbo or supercharger project. · Precision machined from Billet Aluminum 6061-T6 featuring a beautifully-crafted sensor mount for clean lines with precision TIG welds. · Our undercut ends gives your silicon hose connection a cleaner transition; more room for your clamps and a tight fit. · Hand-buffed & hand inspected for consistent high quality. · Stainless steel hardware for mounting is included. · Air straighteners are aluminum honeycomb open cell and seated and fastened in a precision machined recess on the inlet side for a secure position. Reuse your OEM sensor! Sensor socket bore inside dimensions are 1.350” (34mm) Distance between centers of two mount screws is 1.860” (47mm). The MAF sensor geometry that fits this housing is very common with many cars. If your sensor fits the socket bore dimensions above, it will mount into this MAF Housing. Fitment for Audi, VW, Seat, Skoda, Opel, Vauxhall, Citroen, Nissan, Porsche, Volvo, Fiat, Hyundai, Land Rover, Mercedes-Benz, Ferrari & BWM: This MAF fits the sensors listed below. Originally designed to fit the VW MK4 sensor, this housing fits 27+ sensors that share the same key dimensions – the distance between centers of the two mount holes and the diameter across the O-ring. The MAF design accommodates the slight difference in length among these sensors. Bosch OEM Makes vehicles 0 280 217 121 06A 906 461; 95VW 12B529BB VW, Audi, Seat, Skoda 43 0 281 002 757 038 906 461C VW 16 0 280 218 002 06A 906 461A VW, Audi, Seat 58 0 280 218 032 06A 906 461D Audi, VW 20 0 280 218 063 06A 906 461L Audi, VW 86 0 280 218 260 06A 906 461G VW, Audi, Seat, Skoda 72 0 280 218 013 06B 133 471