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Availability: Kits are built to order and usually take 6 weeks to ship.
* Kits are now being shipped with cast exhaust manifolds only. Tubular versions are no longer available.
* This kit will work with PTE only. Please do not try to adapt this kit with any other turbo or you will be faced with horrible fitment issues.
** Bottom engine cover will need to be trimmed to fit the screamer pipes as shown in the pictures.
OVERVIEW
This B58 kit was developed after repeated requests for a top mount setup with external dump tubes (screamer pipes) and a Precision turbo. The previous DOC Race kit used a Borg Warner EFR turbo — a very good turbo that made strong power, but one that became extremely difficult to keep in stock and expensive to buy. Rather than patch the old design, DOC Race remodelled the kit completely around a Precision (PTE) turbo, a pair of Turbosmart wastegates and external dump tubes.
That combination had already proven itself on the DOC Race B58 Supra turbo kit, so the work was in making everything fit the F and G chassis cars. Months of redevelopment and testing went into the result.
What makes this kit good value is the detail: a stainless oil drain line, OEM-level fit and finish, manifold ports matched precisely to both the engine and the turbo, nylon tubing for the wastegate connections instead of silicone vacuum line, true twin scroll for improved boost response, two Turbosmart wastegates for optimal boost control, two 1.75" dump tubes, a 3.5" stainless downpipe, a turbo blanket, and coatings on all parts to protect against heat and corrosion.
SPECS
- Cast T4 twin scroll exhaust manifold; all manifold ports matched to the engine and to the turbo
- True twin scroll design for increased boost response
- Two Turbosmart 40mm external wastegates for boost control
- Two 1.75" external wastegate dump tubes (screamer pipes)
- 3.5" stainless steel downpipe
- Stainless oil drain line, stainless oil feed line and stainless coolant bypass line
- 1/4" nylon tubing and fittings for wastegate routing in place of silicone vacuum line
- All parts coated to protect against heat and corrosion
- Turbo blanket and heat shield included
- PTE 6266: fast spooling, full boost around 3000 rpm, still capable of 700+ whp
- PTE 6466: slightly laggier than the 6266 but capable of 800 whp; 15 psi at 3000 rpm was seen during development
- PTE 6870: 900 whp turbo — requires a built engine and built transmission
- PTE 7275: maximum-effort option for builds beyond the 6870
- Compatible with PTE turbochargers only
- Built to order; approximately 6 week lead time
PARTS INCLUDED
- PTE turbocharger
- 2 x Turbosmart 40mm wastegates
- Cast T4 twin scroll exhaust manifold
- 3.5" stainless downpipe
- 2 x wastegate dump tubes
- 2 x charge pipes, turbo to throttle body
- Silicone couplers and clamps
- Stainless oil drain line kit
- Stainless oil feed line kit
- Stainless coolant bypass line
- T4 gasket
- Turbo studs and nuts
- Manifold studs and nuts
- Exhaust V-band clamp
- 4" shorty filter
- Turbo blanket
- Heat shield
- 1/4" nylon tubing and fittings for wastegate routing
TECH RESOURCES
Required Extras
- Engine management / tuning by an experienced B58 tuner. DOC Race states the power figures above assume a good tuner. Options we stock: BOOTMOD3 B58 tune and the JB4 Tuner for BMW B58 Gen1 & Gen2.
- ECU unlock is required before a locked B58 DME can be flashed with bootmod3 or MHD — see our ECU Unlock Service for BMW B58 Engines.
- A Precision (PTE) turbocharger only. Adapting this kit to any other turbo will cause severe fitment problems.
- Supporting hardware for your power target — fueling, intercooling, clutch and drivetrain should be specified to match the turbo you choose. The 6870 in particular requires a built engine and built transmission.
- Trimming of the bottom engine cover is required to clear the screamer pipes. Installer-supplied cutting tools.
Installation
- Bottom engine cover must be trimmed to fit the screamer pipes as shown in the product photos.
- DOC Race does not publish a downloadable installation manual for this kit. Contact Speed Logic at (888)-564-4215 for fitment and installation support.
VEHICLE APPLICATIONS
| Make / Model | Chassis | Engine | Years |
|---|---|---|---|
| BMW B58-equipped F and G chassis models | F Chassis / G Chassis | B58 3.0L Turbo I6 (Gen 1 and Gen 2) | Gen 1 and Gen 2 B58 model years |
DOC Race does not publish an official part number for this kit, so no part number is listed. DOC Race also does not publish a model-by-model fitment chart for this kit — confirm your exact model, chassis code and model year with Speed Logic before ordering.