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\nThe supercharger-specific Race Port features a soft spring so it can stay open at idle when the supercharger is still producing boost
though has a small and tight engine bay
BMW 328 'pre-war'
0 ST 2005 - 2008
8HP70/75 D-Drum C1J \nThe supercharger-specific Race Port featuresDoes your D drum splines have significant wear? Replace it before it fails! Brand new aftermarket cast machined D drum for your 8HP70 8HP75 and 8HP55 transmission with 63 splines. The drum features higher quality cast material and hardening process over the OE drum, and is machined to a much higher finish. The D drum splines are made of aluminium, and is a high stress area of the 8HP transmission. These wear out and will need replacement if wear are
