For G80 M3, G82 M4, G87 M2 owners chasing real intake flow without heat soak or drone - this BMS kit replaces the restrictive factory upper airbox only, keeping OEM lower ducting and cold air routing intact.
Stage 1 fast road fit: no ECU tuning needed, fully reversible, fits all S58 engines (G80/G82/G87/G83)
Uses proven BMS 1123 inverted cone filters - oiled renewable or dry extendable, cleanable every 15k-20k miles
3.5 inch mandrel-bent aluminium piping + CNC billet turbo inlet adapter - built for track day durability and daily driver reliability
No thermal penalty: retains factory cold air feed and lower airbox, so intake temps stay stable on cruise and WOT
Sounds like an S58 should: sharper throttle response, faster spool, clean induction howl - no artificial drone or resonance
Also searched as: G80 decat intake, G82 track day air intake, G87 S58 fast road upgrade, BMS G80 intake, S58 stage 1 induction, G83 M4 intake kit.
