BOSS650 Turbo Upgrade for VW GTI/Golf R, Audi A3/S3

CTS Turbo's fully redesigned Version 3 BOSS650 for the MQB platform — a ground-up rework of the popular BOSS 650 built in response to demand for a sharper MQB upgrade.

Reverse-rotation core, factory-location fit

At its core is a reverse-rotation Gen2 30/71 CHRA. The housing is cast and machined to clear any exhaust downpipe for strong boost response with no restriction, and factory wastegate geometry is retained for easy tuning. The 2.5" turbo outlet sits in the factory location for simple compatibility with a 2.5" turbo outlet pipe. An integrated wastegate actuator bracket plus oil and water lines round out a straightforward install.

Compatibility

• Currently compatible only with a CTS Turbo intake or aftermarket equivalent (other brand intakes need a different coupler)
• CTS Turbo or other billet diverter/blow-off valve; factory DV works
• 2.5" turbo outlet pipe required (sold separately)
• Clears any exhaust downpipe

In the box

• Gen2 30/71 dual ball-bearing reverse-rotation CHRA
• CTS Turbo exhaust housing for factory location
• CTS Turbo integrated wastegate actuator bracket
• CTS Turbo oil lines for factory location
• CTS Turbo water lines for factory location
• CTS Turbo 3.25" cast turbo inlet
• All hardware required for installation

Features

• 650hp capable (depending on fueling and engine mods)
• Direct bolt-on with no modifications to the car
• Tuning available for North American fueling and for upgraded fueling from United Motorsport, COBB and Eurodyne

Fitment

• 2015-2020 VW GTI MK7
• 2015-2020 VW Golf R MK7
• 2015-2020 Audi A3 8V
• 2015-2020 Audi S3 8V

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.