do88 complete performance air intake system designed for an easy drop-in-fitment in your BMW M2C / M3 / M4 F8X

The S55 turbo engine that powers the BMW M2C / M3 / M4 F8X has two air filter boxes that feeds the turbos with fresh air. The OE air filter boxes has panel filters that are quite small and therefore quite restrictive for the air flow.

Our goal when designing our new intake system was that it must be enclosed, so it does not draw hot air from the engine bay which many aftermarket intake systems do. If the intake system draws hot air from the engine bay it is directly equated with warmer charge air (higher IAT). During all test we have carried out during the development of our entire BMW F8X M2C/M3/M4 product range we see clearly how the power band is directly equated with the IAT (Intake Air Temperature) and turbo inlet restriction.

When designing our upgrade intake system, we started with 3D-scaning the engine bay on our M3 Competition. This gave us an exact 3D-model of the available space to design our intake system in. We found that we could use large double cone BMC air filters with large filtering area for high flow not just when new (small filters starts to flow worse after short usage). We could also use 3” (76mm) tubing which we designed with as few and smooth bends as possible to reduce the air flow restriction. To eliminate hot air from being drawn into the air filters we designed heat shields and lids that together with rubber sealings makes our system feed the engine with nice cold air.Our intake system uses the OEM fresh air inlet ducts that feeds the air filters with fresh air from the grille. We have tested these, and they are not a restrictive part in this system and with the pressure zone that builds up behind the grille at speed adding scoops will not make much of difference.

Our intake pipes are manufactured in 76mm (3”) mandrel bent seamless aluminum pipes. Both the intake pipes and heat shields are finished with a tough matte black structure powder coat. For the air box lids we went for a design made in a lightweight polycarbonate material with a nice satin black finish.

All these improvements have resulted in an impressive +10 hp top power gain and in the mid-range RPM we see up to +20 hp / + 40 Nm. This test was performed on our M3 with a BootMod3 Stage 1 (93) tune.

Significant advantages with do88 performance intake system (stock comparison numbers):
- +10 hp peak power gain!
- +20 hp / + 40 Nm increase in the mid-range RPM!
- 769CFM air flow at 0,025bar/0,36psi pressure drop (678 CFM), do88 13 % higher!
- The BMC filters are regenerable for long life!
- Improved intake sound! If even more intake sound is desired the system can be used without the lid on the air filter housing. This will in some conditions give higher intake air temperature.