Porsche Momo Arrow Horn Button Round Lip - Black - Yellow Logo HORN/LG/BYW JG.013.00 so you cannot use it

so you cannot use it with bore sizes other than the one listed for each specific part number

Fits any standard air valve stem

Boxster (2009-2014) and Cayman (2009-2012

00mm head register**) for 60

Not DOT approved

Porsche Momo Arrow Horn Button Round Lip - Black - Yellow Logo HORN/LG/BYW JG.013.00 so you cannot use itPorsche NOTE: MOMO Retainer Ring (supplied with the MOMO steering wheel, not included) required to fit MOMO Horn Buttons onto MOMO Steering Wheels. Offered in many styles and two mounting types, official MOMO horn buttons add a personal touch to your MOMO steering wheel with exceptional quality. Mounting Type: Rounded (Protrudes ~3mm out of the steering wheel, 59. 4mm Outer Diameter)