Turbosmart TS-0203-1050 Dual-Port Kompact BOV Kit for 06-16 BMW N54 135i/335i/Z4

Vehicle Fitment

• 2007-2016 BMW 335i (E90/E92/E93) N54 3.0L Twin-Turbo
• 2008-2016 BMW Z4 sDrive35i / sDrive35is (E89) N54 3.0L Twin-Turbo
• 2008-2013 BMW 135i (E82 / E88) N54 3.0L Twin-Turbo
• 2007-2010 BMW 335i (E60 / E61) N54 3.0L Twin-Turbo -- check factory bypass valve setup

Fitment Notes

• Kompact Dual Port blow-off valve (BOV) kit replaces factory plastic bypass valves
• Requires the "Kompact BMW Kit" plumbing/hose kit for full installation (included)
• Fitment for Z4 requires additional pipe kit TS-0203-2001 to route correctly in some serial configurations
• Compatible only with cars that retain factory turbo & intake plumbing; modifications may require custom hoses
• Verify you have N54 engine -- does not fit N55 / B58 etc. without extra adapter work

Features

• Kompact Dual-Port design with sequential actuation -- one port for recirculation, one for atmospheric release
• Aluminum and billet components to replace plastic OEM parts, improving durability and response
• Comes with all hoses, clamps, and fittings necessary for bolt-on installation in most N54 setups
• No boost leaks; cleaner sound with proper dump or recirc as configured
• Black anodized finish to resist corrosion under engine-bay heat and pressure
• Designed for performance and audiophiles -- audible sound customization via port configuration
• Engine performance reliability with improved throttle response on boost transitions
• Support documentation and install instructions provided by Turbosmart

Specifications

• Product type: Dual-Port Kompact Blow-Off Valve (Kit)
• Material: Billet aluminum, anodized finish; high-quality hose and clamp hardware
• Engine compatibility: BMW N54 3.0L twin-turbo engines
• Boost pressure rating: rated for up to ~25-28 psi (OEM turbo pressure) without failure
• Height & width: designed to fit in stock engine bay locations for boost piping clearance
• Warranty: Manufacturer warranty on material and workmanship

Included Components

• 2x Kompact Dual-Port BOV valves
• Full hose, clamps and fittings kit for BMW N54 setups
• Pipe kit TS-0203-2001 (if required for Z4 or special piping configurations)
• Installation instructions & diagrams

Product Description

The Turbosmart TS-0203-1050 Dual-Port Kompact BOV Kit is a high-quality upgrade for BMW models equipped with the N54 twin-turbo 3.0L engine (2006-2016 135i, 335i, Z4, etc.). This kit replaces the brittle OEM plastic bypass valves with a billet, dual-port design that offers better response, superior durability, and the option to tune sound character via port selection (recirculation vs atmosphere).

Installation is bolt-on and includes all necessary hardware, hoses, and clamps for most N54 setups. For certain Z4 chassis or unique factory plumbing layouts, an optional pipe kit (TS-0203-2001) may be required to complete the fit. This upgrade improves throttle response, reduces boost leak potential, and delivers an aggressive, clean blow-off sound while maintaining reliability.