Replaced OEM in tank fuel pump for 1986 Mazda RX7. Smaller diameter 1.5 " vs 2.0" required zip ties for easy installation. All parts were included for installation. While I haven't measured it yet, there appears to be more than enough fuel pressure and flow for engine to fire up immediately ( within 5 seconds) and to run smoothly, even under hard acceleration. Only time will tell about durability!