Efficient flowpath with consistent boost control

Keeps wastegate cold-side in cool air for reliability and easy spring changes

Places O2 sensors in ideal location to keep sensor body temps down to prolong life and allow easy access for service

Fewest joints and welds for leak-free, trouble-free operation

Provides ample clearance from all hot-side components

Allows use of stock motor mount isolator


The unique configuration of the manifold, turbo, wastegate, downpipe, and wastegate dump pipe is USPTO patent pending


Similar to our N55 manifold, we designed the N54 manifold to not sacrifice on anything. Maximum bend radii, flow simulation, stress analysis, thermal cycling analysis . . . This manifold design takes an OEM approach to making huge power.


Decisions, decisions . . . choose from over 20 different turbochargers from the best manufacturers. With both T3 and T4 manifolds, you have options.


SX-E : 252, 257, 362, 363, 364, 366 & 369


GT: 3071R BB, 3076R BB & 3582R BB

GTW: 3476 JB, 3684R BB & 3884R BB

GTX: 3071R GEN II, 3567R GEN II, 3076R GEN II, 3582R GEN II, 3584RS GEN II & 4088R BB


MFS: 6176E & 6776E

CEA JB: 5558, 5858, 5862, 6262 & 6266 

CEA GEN II: 5558, 5862, 6062, 6266, 6466, 6870 & 6875 


In order to create the most efficient flow path into and out of the compressor, custom silicone tubing, combined with mandrel formed aluminum tubing is used.


Stainless steel downpipe and wastegate dump, crafted with mandrel bends, tig welds, and cnc flanges.


Clean engine bay, keeping the heat down low and out of the way, just like the factory intended. Lots of room for a generous sized air filter (important to minimize pressure delta across filter, as small filters can create pressure drops and increased turbo bearing wear, shortening the life of your turbo).

Note - it is possible to keep the coolant overflow tank in the original location, we just prefer moving it to give a cleaner look, and allow more airflow on the turbo side of the engine.


Currently verified on LHD E8X and E9X, both AWD and RWD



Turbo of your choice (T3 or T4 from BW, Precision or Garrett)

Cast Exhaust Ceramic Coated Manifold (divided for twin scroll), single wastegate port (fully divided), O2 bungs (N54 version)

TiAL MVR or Turbosmart Hypergate wastegate (you may also choose to purchase the kit without a wastegate)

Tig welded 3” stainless steel downpipe

Tig welded 1.75” stainless steel wastegate pipe

RH engine mount support bracket, for use with stock isolator to maintain vehicle NVH

Billet aluminum coolant manifold

Silicone coolant hose from pump to block/manifold

Stainless braided oil feed hose

Billet aluminum oil drain manifold, fitting, hose

Billet aluminum oil and coolant block fittings and plugs

Billet aluminum intercooler adapter (stock style connection)

Silicone inlet hose (turbo to air filter)

Silicone boost pipe (turbo to intercooler)

Stainless steel V-band clamp

Required fasteners and hose clamps

Air Filter

Full instructions with pictures

Please note: to keep pricing low, the N54 kits are being made in batches. Lead time is generally 2 to 4 weeks. Email or for info.

performance/dyno data

dyno notes:

- Vehicle configuration: 2010 335i, Speedtech N54 BW SX-E 364 (8776) turbo kit with Speedtech Port Injection.

- Boost set at 29psi

- 810whp, 724wtq

- Spool-up by 3500rpm on a low cost reliable journal bearing BorgWarner capable of 800whp!!!