Well sorted, track prepped, “sleeper” 2011 BMW 135i with 6-speed manual transmission, with 93,500 Kms.
Purchased Certified Pre-Owned back in June 2013 with 48,000 Kms.
(Im the 2nd owner). Car not winter-driven during my years of ownership (stored in my heated garage from Nov-April).

This 2011 MY car has the reliable 2nd gen N55 twin-scroll turbo inline-6 engine, not the older 1st gen N54.

Several months of research and posts on 1addicts.com forum, led to gradual and purposeful modifications to address the weaknesses of the car (see list of mods below).

Strictly Maintained (engine oil changes every 2-3 track days. Brake fluids twice per season, transmission and differential fluids changed once per season).
Maintenance records available.
List of mods (about $10,500 in parts and labor):
Power: 375HP and 420ft-lbs of torque with 94 Octane fuel, and stage-2 map.
• Cobb Accessport V3 with several maps to choose from, including 5 custom tunes from PTF (PowerTuningFreaks).
• ER Aluminium ChargePipe (still have the OEM original)
• ER FMIC Intercooler (still have the OEM original)
• Performance Line Downpipe (Still have the OEM original)
Suspension:
• M3 rear subframe bushings (to tighten the wavy rear end designed for RunFlat tires)
• Meghan Racing adjustable Rear Toe arms (to tighten the rear end and steady Toe under load)
• Ground Control Street Camber Plates (now set at -3.5* camber to complete remove understeer)
• M3 front control arm conversion from TRW (tighter front end. Provides some camber. Pushes out the bottom of the wheels slightly).
• M3 Rear Guide Rods from TRW
• H&R 27mm Solid Front Sway Bar (flatter in the curves. Better turn- in).
• Swift Spec-R lowering springs (lowers by an inch and slightly stiffer than stock. Provides max clearance for 8.5 wheels. No rubbing.)
• Bilstein B8 dampers (to accommodate stiffer springs)
• Dinan Rear Shock Mounts
Other modifications and equipment :
• BMS Oil thermostat bypass valve for continual oil flow – never ran into overheating issues.
• CDV delete – faster clutch engagement.
• Quaife Limited Slip Differential with 3.46 final drive ratio (more predictable under acceleration at turn out, and more punch than original 3.08 ratio) worth over $3000.
• Schroth Quick Fit Pro 4-point harness
• Non-slip pedals
Bushings and mounts: Stiffer bushings for the driveline. Transmits NVH to the cabin but adds “character” to the car.
• AKG Motorsport 75D durometer Engine Mounts (no movement from engine when up/downshifting under load)
• ECS tuning 80a durometer transmission mounts (no movement from transmission when up/downshifting under load)
Brakes: OEM 6-piston front and two-piston rears
• Front and rear caliper rebuilt with stainless steel pistons from RacingBrake.com – replaced crumbling ceramic top OEM caliper pistons
• GoodRidge Stainlesss Steel brake lines at four corners (stiffer pedal).
• 2 inch brake cooling ducts connected to fron brake dust shields.
• SpeedBleeders from BestBrakes - allows rapid caliper bleeding by yourself.
• Half-life Hawk DTC-70 fronts, and Carbotech Xp10 rear at the moment.
• Titanium shim brake backing plates from HardBrakes.com (not on the car)
• Several Brake pads with 25% life left in them or less.
Wheels/tires: Three sets of wheels, and two sets of /tires:
• Four “squared” 255/35R18 Continental ExtremeContact tires, on BMW 8.5.x18 ET52 style-261 wheels (street and wet track set with plenty of thread left).
• Four “squared” 255/40R17 Nitto NT01’s tires on BMW 8.5x17 ET50 style-68 wheels (dry track set with 2 more track days of life)
• Four unused Front 7.5x18 BMW style-261 wheels (original fronts from two sets of staggered)


• No lowball offers will be entertained, nor answered..
• No stunt drivers or test pilots.
• No part-out sale
• Stored for Winter from end of October to early April.
• Not in a hurry to sell, and will only respond to serious offers.
• Original parts still available (FMIC, Downpipe)