Mercury - Gear Housing Assembly Basic for 5.44 Torpedo Lower Unit- Counter Rotating - Silver - 8M0117282 - See Below for Applicable Models: 200 HP Verado 6 CYL - Serial range 2B144123 through 2B578935 225 HP Verado 6 CYL - Serial range 2B144123 through 2B578935 250 HP Verado 6 CYL - Serial range 2B144123 through 2B578935 275 HP Verado 6 CYL - Serial range 2B144123 through 2B578935 300 HP Verado 6 CYL - Serial range 2B144123 through 2B578935 350 HP 2.6L L6 Pro Verado - Serial Range 2B1411124 and Above 350 HP 2.6L L6 Verado - Serial Range 2B141617 and Above 400 HP 2.6L L6 Verado - Serial Range 2B618256 and Above 400R HP 2.6L L6 Racing- Serial Range 2B618256 and Above