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Oldmancycle
Welcome to the forum.
I have m135i with BMS JB4 stg2 piggyback ECU, AFE drop in air filter and ram air scoop, BCS sports cat downpipe and m performance rear exhaust.
Set up on a rolling road, map 6 gave me 380 Bhp and 450lbft torque.
Maybe more to come if I add extra EWG and FF harnesses to my JB4.
On the chassis, I have up rated springs and anti roll bars. Also have Quaife LSD installed in rear axle.
Stock intercooler is retained but may consider either upgrade to Forge or Wagner competition.
Car handles like its on rails yet ride is still very good. Car gets down the road very quickly and sounds superb too.
PD
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