STM Water Pump Bypass with -16ORB for Evo 8/9 (EVO89-WPB) Gorilla ACL Race Series rod bearings

ACL Race Series rod bearings for the 6-bolt 4G63 1G DSM and GVR4

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• Dyno-Proven Gains up to +11 HP and +14 Lbs

Part Number: Reference Number: 108504 (31149)

STM Water Pump Bypass with -16ORB for Evo 8/9 (EVO89-WPB) Gorilla ACL Race Series rod bearingsThe billet STM Evo 8 9 water pump bypass plate features a 16 ORB outlet. It was designed by the STM team and used in several STM race cars over the years when installing an electric water pump for various reasons. In most cases, when it comes to high reving Evos, the water pumps tend to fail. Using this plate in conjunction with an electric pump removes one more failure points, allowing you to choose water flow rotation and gain control over water