Carbon Fiber Plenum Lid. Prepreg S62 Carbon Fiber Plenum Lid Introducing our S62 Carbon Fiber Plenum Lid. Made from 100% prepreg carbon fiber, this lid is a direct replacement of the stock plastic version and unleashes sound of the of the BMW S62 V8 engine. Although there isn’t a performance gain, the induction sound generated improves the driving experience of the M5/Z8 to a whole new level. At low RPMs there is a deep resonating tone which increases in pitch with acceleration. At higher RPMs the lid gives the E39 M5 an almost CSL like sound and is truly an intoxicating experience. We went through several iterations using different carbon thicknesses to fine-tune the sound and the resulting plenum generates a significant increase in volume with a more melodious induction sound. This plenum can be used with the OEM airbox or any aftermarket intake system. *M Badge and M Power strip not included *Some images show our optional Carbon intake. *By request/order.