Pull the covers off an S63 in an F90 M5 or F9X M8 and follow the air. It comes out of the airboxes, then squeezes through a pair of plastic inlets that neck down hard right before the turbos. That choke point makes both turbos work harder than they need to. Everything else in the intake tract can be perfect and that pinch is still there.
The Dinan Carbon Fiber Turbo Inlet Pipe Set removes it. Each inlet on the BMW F90 M5 and F90/F91/F92/F93 M8 is replaced with a gloss UV-coated 2x2 carbon fiber pipe shaped for the largest cross section the space allows, all the way from filter to turbo. Volume goes from 35 to 105 cubic inches per side. That is about 200% more than stock.
What Dinan Carbon Fiber Turbo Inlets Do for the S63
On an otherwise stock car, Dinan measured average gains of 11 WHP and 13 WTQ from 2000 RPM to redline, with peak gains of 22 WHP and 18 lb-ft at 6500 RPM. Dinan's instrumented engine testing showed why. With less restriction ahead of the compressor, each turbo runs a lower pressure ratio. That means lower shaft speeds, lower compressor discharge temperatures and more headroom for higher boost if you keep building.
The shape looks unusual for a reason. It follows the maximum cross-sectional area Dinan could fit, not a neat round tube. The pipes are 100% genuine carbon fiber, which also insulates the incoming air from engine bay heat better than thin plastic. They work with the factory airboxes or the Dinan Cold Air Intake. Pair them with the Dinan intake and the whole system flows the way it was designed to.
Dinan Turbo Inlet Install, Tuning and Legal Status
No tune is required. The carbon pipes join an aluminum adapter that uses the factory locking system at the turbo, so each side clicks home when it is seated. Dinan quotes about 1 hour of labor. Before you order, know this: it is not legal for sale or use in the State of California. CARB testing for an Executive Order and 50-state compliance is pending. Dinan states it is legal under the EPA's November 23, 2020 Tampering Policy in other states. Dinan part number D760-0053. Sold by AutoTecknic, an authorized Dinan dealer.
What's Included
- Two gloss 2x2 carbon fiber turbo inlet pipes with aluminum turbo adapters
- Gasket seals and retaining clips
- Intake hoses with bellows and clamps
Key Features
- Dinan-tested average gains of 11 WHP and 13 WTQ from 2000 RPM to redline
- Peak gains of 22 WHP and 18 lb-ft at 6500 RPM on an otherwise stock car
- 105 cubic inches per side vs 35 stock, about 200% more volume
- Largest possible cross section from filter to turbo
- Gloss UV-coated real 2x2 twill carbon fiber, not a wrap or overlay
- Lower turbo pressure ratio, shaft speed and compressor discharge temperature
- Works with the factory airboxes or the Dinan Cold Air Intake
- Uses the factory locking system at the turbo, about 1 hour install
Vehicle Fitment
Fits the following S63-powered BMW M models:
- BMW M5 / F90 Sedan (2018-2023): M5, M5 Competition
- BMW M8 / F92 Coupe (2020-2025): M8, M8 Competition
- BMW M8 / F91 Convertible (2020-2025): M8, M8 Competition
- BMW M8 / F93 Gran Coupe (2020-2025): M8, M8 Competition
Compatible with the factory airboxes and the Dinan Cold Air Intake. Compatibility with other aftermarket intakes is not guaranteed.
Installation Notes
This is one of the simpler jobs on the platform. Work on a cool engine, follow the Dinan instructions in the kit, and torque the strut brace back to spec.
- Remove the engine compartment covers on both sides.
- Loosen the clamps, remove the acoustic cover and strut tower brace, and lift out the airbox assembly.
- Disconnect the tank vent line and unlock the retaining clips to remove the stock turbo inlets.
- Fit the gasket seals and retaining clips to the Dinan inlets, then slide on the intake hose bellows and clamp them.
- Click the new inlets into the turbos, reconnect the vent line, seat the bellows on the airbox outlets and tighten the clamps.
- Reinstall the strut brace to the specified torque and refit the engine covers.
