High Performance Oil Pumps - 25% more volume and pressure - Higher quality housing, 40,000 PSI material - Thicker neck and bolt flange in these key areas to prevent breakage at high RPM SB Chevy MIL18750 SB Chevy, 3/8" deeper, 5/8" pickup inlet $29.99 MIL18755 SB Chevy, Standard Volume $20.99 MIL18770 SB Chevy - with a BB Chevy 3/4" pickup inlet $56.99 BB Chevy MIL18760 BB Chevy 3/4" pickup inlet $52.99