BMW 335i N54 T3 Top Mount Single Turbo System

Description

Transform your N54-powered BMW into a true street-performance machine with the On 3 Performance Top-Mount Single Turbo System. Designed to replace the restrictive factory twin-turbo setup, this kit unlocks serious power potential while simplifying the engine bay for serviceability and reliability.

When paired with a proper tune, fueling, and supporting mods, the On 3 Top-Mount kit supports 550–800 whp capability depending on turbo size and fuel type. Expect faster transient response, improved spool, and reduced complexity versus the factory twin-turbo system.

Kit Includes:

• Your Choice of Turbo
• Billet Plugs Factory Water Ports
• Billet Plugs For Factory Oil Supply Ports
• Billet Plugs For Turbo Water Drain
• Billet Plugs For Factory Turbo Oil Drain
• Custom Billet Oil Supply Fitting for New On 3 GT Series Turbo
• Custom Turbo Oil Restrictor Fitting
• Custom Billet Turbo Oil Drain (Into Engine Block)
• 2 Piece Manifold
• Wastegate Dump Tube
• 2.5″ charge pipe
• 7″ core On 3 Performance air to air intercooler
• 3″ polished aluminum charge pipe
• 50mm On 3 blow off valve
• Custom Billet Power Steering Reservoir

Note(s):

• Requires N54 single-turbo tuning and compatible charge-pipe setup.

• Recommend professional installation and proper engine health verification prior to conversion.

• For track or high-boost use, upgraded fueling and clutch/drivetrain components are advised.