OVERVIEW
The S55 engine in the F8x M2 Competition, M3 and M4 ships with plastic boost tubes that are a known weak point. Under higher boost they can crack at the flange, split along the body or blow off the intercooler couplers, leaving the car down on power or stranded. This BMS kit replaces them with heavy-duty aluminum pipes: choose the hot-side pipes and cold-side J-pipe combo, or either section on its own.
Each pipe uses CNC-machined flanges with a raised lip so it locks into place much like the factory part, and the wrinkle black powder coat blends into the engine bay. Pre-capped 1/8" NPT bungs give you ready ports for a boost gauge or water/methanol nozzle later on. The kit is a bolt-in upgrade that comes with the couplers, clamps and hardware needed for installation, making it a sensible first reliability mod for tuned S55 cars.
SPECS
- Material: heavy-duty aluminum
- Flanges: CNC-machined with protruding lip for an OEM-style fit
- Finish: wrinkle black powder coat
- Bungs: pre-capped 1/8" NPT bung on each hot-side pipe and on the J-pipe
- Hot-side couplers/clamps: 2.25" silicone couplers with 2.25" heavy-duty hose clamps
- J-pipe coupler: 3.25" heavy-duty silicone
- Replaces factory plastic hot-side charge pipes and cold-side J-pipe
- Bolt-in installation
PARTS INCLUDED
- (2) BMS aluminum hot-side charge pipes
- (1) BMS aluminum cold-side J-pipe
- (2) Heavy-duty 2.25" silicone couplers
- (4) Heavy-duty 2.25" hose clamps
- (1) Heavy-duty 3.25" silicone coupler
- (1) Charge pipe clip
- (1) Charge pipe O-ring
- (3) 1/8" NPT bungs
- (2) M6 x 1.0 x 20mm screws
TECH RESOURCES
Additional Parts Required
- No additional parts required – couplers, clamps and mounting hardware are included.
Installation
VEHICLE APPLICATIONS
Fits S55-powered BMW M2 Competition, M3 and M4 only. Does not fit the N55-powered base M2.
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | M2 Competition | F87 | S55 3.0L Twin Turbo I6 | 2018–2021 |
| BMW | M3 | F80 | S55 3.0L Twin Turbo I6 | 2015–2020 |
| BMW | M4 | F82 | S55 3.0L Twin Turbo I6 | 2015–2020 |
| BMW | M4 GTS | F82 | S55 3.0L Twin Turbo I6 | 2015–2020 |
| BMW | M4 Convertible | F83 | S55 3.0L Twin Turbo I6 | 2015–2020 |



