Video Twin Turbo LSX427 Steady State on Engine Dyno Advertisement ByEngine Builder on Mar 22, 2013 This short video shows a customers Twin Turbo charged LSX 427 being run on our engine dyno at steady state for testing. The turbo’s are 72mm. The engine is 4″ bore x 4.125 stroke using the LSX block.Click Here to Read MoreAdvertisement Advertisement In this article: Video: Finishing Touches on the New SML Heads Video: EB Takeover: Saris Performance Marine Video: Double Check Your Rod Bearing Clearance Video: 2022 Don Ridler Winner “SHO Bird” – ’31 Chevy with Twin-Turbo 509 W Series BBC Engine Advertisement