OVERVIEW
Individual DOC Race components for N54 single turbo conversions — the complete top-mount hot parts kit, the T4 twin-scroll manifold, charge pipe, oil lines and fittings, coolant relocation parts, gaskets and heat shield — for building or servicing a conversion piece by piece.
SPECS
- Top Mount Hot Parts Kit: one-piece T4 twin-scroll manifold, one-piece downpipe to factory location, dump tubes for 2 x Turbosmart 40mm wastegates, ceramic coated
- Single Turbo Manifold: T4 twin scroll, provisions for dual Tial MVS wastegates
- Charge Pipe: made for the DOC Race top-mount kit
- Coolant Pipe Relocation Kit: required when converting to a single turbo (manual or automatic)
- Coolant Block Interface Plugs: for turbos without coolant fittings (Precision, Comp)
- Oil Feed Interface Fitting: low profile, -4AN, fits most single turbo kits
- Oil Drain Line and Oil Drain Fitting: for the top-mount turbo location
- Exhaust Manifold Gaskets: made for DOC Race kits, also fit other brands and the N55
- Heat Shield: stainless, mounts with 4 x 6mm bolts at the factory location
PARTS INCLUDED
- Selected DOC Race component
- Fittings and hardware where applicable
TECH RESOURCES
Required Additional Parts
- A turbocharger, wastegates and tuning are required to complete a single turbo conversion and are sold separately — see the DOC Race N54 Top-Mount Single Turbo Kit.
- Tuning: Burger Motorsports JB4 Tuner – N54, MHD Super License – N54.
Installation
- The hot parts kit and manifold are designed for the RWD top-mount layout.
- DOC Race does not publish installation manuals for these components. Contact Speed Logic for install support.
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | 135i Coupe | E82 | N54 3.0L Twin-Turbo I6 | 2008–2010 |
| BMW | 135i Convertible | E88 | N54 3.0L Twin-Turbo I6 | 2008–2010 |
| BMW | 335i Sedan | E90 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i xDrive Sedan | E90 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i Coupe | E92 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i xDrive Coupe | E92 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i Convertible | E93 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335is Coupe | E92 | N54 3.0L Twin-Turbo I6 | 2011–2013 |
| BMW | 335is Convertible | E93 | N54 3.0L Twin-Turbo I6 | 2011–2013 |

