Speedy Turbo TD04L-19T-V4.2 (Pair)

-The V4.2 iteration of this turbo features several key improvements over previous versions. -Billet compressor wheels: The V4.2 uses a 6+6 blade ultra-flow billet compressor wheel with an extended tip design. This upgraded design moves more air than the standard cast wheel, leading to a faster spool and increased power. -Upgraded turbine wheel: Some versions feature a TD04L 6+6 blade ultra-flow turbine wheel, while others may come with a 9-blade version for faster spool-up. -Upgraded bearings: The V4.2 has improved thrust bearings and washers, which are common failure points in earlier versions. A dual oil port thrust assembly is also machined from a copper bar for improved reliability. Performance potential: These turbos are rated to support significantly higher horsepower than the stock N54 turbochargers, with some listings claiming support for up to 900 horsepower. -Improved wastegate assembly: The system includes an upgraded wastegate pivot arm and thicker rod for better longevity and performance. Stainless steel components: The turbine housing and manifold are often made of stainless steel, which is better suited for high-temperature applications. Target vehicles -This twin-turbo kit is a popular upgrade for a range of BMW models equipped with the N54 3.0L twin-turbo inline-six engine from roughly 2006 to 2013. BMW 135i (E82/E88) BMW 335i (E90/E91/E92/E93) and 335is BMW 535i (E60/E61) BMW Z4