This 2009 BMW 135i was acquired by the seller four years ago as a stock example. It was then disassembled and built into a 1M-inspired custom by marque specialist Performance Technic utilizing many BMW parts and assembly procedures. Power comes from an S65 V8 that has been bored and stroked with a Dinan kit. It now displaces 4.6 liters and is reportedly rated at 502 horsepower. A seven-speed dual-clutch transmission and limited-slip differential from a contemporary M3 were also added. The suspension, brakes, and bodywork have been modified using a mix of BMW parts and aftermarket components as detailed below. The build was completed in 2017, and the car has been driven approximately 1,000 miles since. This unique 1-Series is now being offered with build sheets, receipts for parts and labor, and a California title.

Multiple body panels and trim parts were removed and replaced with OEM 1M bodywork by BMW-trained technicians using factory tools and correct factory weld locations. All exterior parts are said to have BMW part numbers with the exception of the RevoZport carbon fiber roof. The car is finished in Space Gray Metallic (A52) over black leather.

Control arms, steering linkage, tension struts, and spring perches were replaced with upgraded BMW parts. AST 5200 series coilovers with remote reservoirs are installed and are rated at 500 lbs in the front and 850 lbs out back. A StopTech Trophy brake kit with stainless steel lines has been added, and Turner rear shock mounts replace stock items.

BMW M3 ZCP 359 alloy wheels measure 19×10″ all around and wear Sumitomo HTR Z 275/30ZR19 tires.

Cabin modifications include a BMW Performance steering wheel and shift boot, as well as LED lighting. The arm rests have also been deleted. Factory A/C reportedly blows cold, and interior functions are said to operate as intended, with no illuminated warning lights.

Heated BMW Performance sport seats are covered in Alcantara and black leather, and Schroth seat belts have been added. The 30k odometer reading reflects the chassis mileage of the donor 135i.

The S65 V8 was bored and stroked utilizing a Dinan kit and now displaces 4.6 liters. It is said to produce 502 horsepower and is mated to a seven-speed DCT that has been upgraded with GTS programming. The E90/2/3 radiator and oil cooler are from CSF Racing.

The front and rear subframes are new OEM parts, and Berk mid-pipes lead to an Akrapovic muffler. A credit union is holding a lien of $9k against the title which must be paid off prior to the title transfer. The video below has been provided by the seller, showing the build in process.