How This BMW G80 M3 Build Reached 1,218 Wheel Horsepower
Bryan’s BMW G80 M3 was already far from stock before this latest round of changes. The car had a built engine, upgraded transmission, upgraded fueling and cooling, and a four-digit power history. In the video below, the Kies Motorsports team takes the next step: installing a JDY single-turbo system, revising the auxiliary fuel setup, completing the calibration on the dyno, and validating the finished combination at the drag strip.
The result shown in the video was 1,218 horsepower at the wheels. That number belongs to this specific vehicle, with its full combination of supporting modifications, fuel, calibration, and test conditions. It is a build result—not a power guarantee for the turbo kit or any individual product.
How the G80 reached 1,218 wheel horsepower
Open the full video on YouTube →The Build at a Glance
This was not a single-part transformation. The video identifies the combination behind the result as a built engine, a Pure transmission, the JDY single-turbo setup, a Precision Raceworks AFS 800 fuel system, bootmod3 tuning with a REV2 controller, HCP calibration, and additional supporting parts.
For the JDY setup installed in the video, Bryan selected:
- The 42 mm manifold-runner option, chosen for the quicker-spooling, street-and-track goal described in the video
- A Precision Next Gen 7275 turbo
- A recirculating wastegate-dump configuration that routes gases into the exhaust rather than using the screamer-pipe option
The video also shows several kit details, including ceramic-coated hot-side components, custom copper gaskets, heat shields, hard lines designed to move fuel routing away from the heat source, a coolant-tank relocation solution, a catch can, and JDY Wiggins-style charge-pipe clamps.
Fuel delivery was revised alongside the turbo installation. Bryan combined his existing Precision Raceworks setup with newer components to add a second Walbro 535 pump, describing the from-scratch configuration as the AFS 800 kit. The car’s port injectors were also changed from 1050 cc to 1750 cc units, and the auxiliary system was wired to work with the REV2 controller.
High-Level BMW G80 M3 Single-Turbo Installation Summary
Important: This is a high-level overview of the process shown in the video, not a complete installation guide or a substitute for the manufacturer’s instructions, BMW service information, correct torque specifications, professional calibration, or installation by a qualified technician.
1. Plan the complete combination
Before removing parts, define the intended use and supporting systems. The video’s car was built for both street use and drag-strip testing, which influenced the 42 mm runner, 7275 turbo, and recirculated wastegate-dump selections. Its final output also depended on the existing built engine and transmission, upgraded fuel system, controller, calibration, and other supporting modifications.
2. Disconnect power and open the engine bay
The first step shown is disconnecting the negative battery terminal. The team then removes the strut brace, engine cover, and intakes before disconnecting the oxygen sensors and moving underneath the car.
3. Remove the underbody and exhaust components
With the vehicle safely raised, the skid plate and stiffening plate come off. The rear exhaust section and downpipes are removed to create access. Because charge-cooler removal will release coolant, the team drains the cooling system; it also drains the engine oil while the car is already in the air.
4. Disconnect the factory turbo systems
From below, the team removes accessible oil lines, coolant lines, heat shields, and bracing. Back on top, it removes the coolant reservoir, additional bracing, fan, and—on this installation—the radiator. The radiator removal is described as helpful rather than strictly required for every case.
The charge pipe and charge cooler are then removed, followed by both factory turbochargers and the original hard fuel lines. The video also shows a small plastic tab being trimmed before reassembly begins.
5. Install the JDY manifold and turbo hardware
The upgraded fuel lines go in first, followed by the manifold and heat shields. The team then sets up the wastegate springs and installs the wastegate, turbo, and charge pipe.
Next, it reinstalls the required factory coolant lines, radiator, fan, and bracing. The catch can and relocated coolant reservoir are added before the engine bay is tidied and the exhaust is reinstalled. The video’s car also receives a carbon-fiber driveshaft while the exhaust is already out, but that driveshaft is a separate supporting modification rather than part of the turbo-kit installation.
6. Upgrade and wire the auxiliary fuel system
The fuel-system portion includes placing the two-pump assembly into the tank, positioning the filters so they do not interfere with the fuel-fill area, connecting the hoses and Y-fitting, reinstalling the bucket and top hat, and completing the wiring.
The video’s configuration uses upgraded solid-state relays. The positive and negative leads are routed to their corresponding battery terminals, while the green trigger wires are joined and connected to the existing lead running to the REV2 controller. The port injectors are then replaced.
7. Complete service items and pre-start checks
Before startup, the team completes the oil change, replaces the spark plugs, refills the coolant, and finishes reassembly. A professional installation should also include careful leak checks, verification of every fluid and electrical connection, and confirmation that the calibration matches the installed hardware and fuel.
8. Calibrate and validate the full system
HCP remotely calibrated the car using bootmod3, with REV2 controlling the port injection and related safeties. The video describes a flex-fuel map designed to work from 93 octane through E85. The team first established a roughly 600-wheel-horsepower base on 94 octane, then added E85R and continued tuning.
Before the track session, the team also installed the linked GSC S58 S2 cams and limited the cam gear. The video reports that those two changes added 145 wheel horsepower on this car, bringing the displayed final result to 1,218 wheel horsepower.
At Cecil Dragway, the car progressed from its previous 9.28-second best to multiple eight-second passes. Its quickest pass shown was 8.50 seconds, recorded after the passenger and rear seats were removed. As with the dyno number, that elapsed time is a result from this particular build and test session—not a promised outcome.
Products Featured in the Video
The following products are featured in the video. Links were checked against the current Kies catalog before this draft was prepared:
Key Takeaways
- The video’s 1,218-wheel-horsepower result came from a complete, already extensively modified G80 M3—not from a turbo swap alone.
- The installed JDY configuration paired a 42 mm runner with a Precision Next Gen 7275 and a recirculated wastegate dump to match Bryan’s street-and-track goals.
- Fueling, controller integration, professional tuning, and the car’s built engine and transmission were all identified as essential parts of the combination.
- The team validated the car on both its in-house dyno and the drag strip, ultimately recording an 8.50-second pass during the session shown.
- Neither the dyno number nor the track time should be treated as a guaranteed result for another vehicle.
Safety and Fitment Cautions
- This is an advanced installation involving fuel, oil, coolant, electrical wiring, exhaust components, turbocharger hardware, and professional engine calibration. Kies strongly recommends qualified installation and tuning.
- Always disconnect the battery before beginning, support the vehicle with properly rated equipment, work only on a cool vehicle, and follow the product manufacturers’ current instructions and BMW service procedures.
- Fuel-system work creates serious fire and exposure hazards. Use appropriate ventilation and protective equipment, eliminate ignition sources, and check the complete system for leaks before startup.
- Confirm every product’s current fitment before ordering. In particular, the linked JDY product is identified as an LHD G8X M2/M3/M4 kit, while the linked DME service is identified for June 2020-and-newer applications. Your chassis, production date, DME, hardware configuration, and selected options must be verified for your specific vehicle.
- Do not copy the featured car’s fuel or calibration strategy without a qualified tuner. Required hardware and safe operating limits depend on the individual build, fuel, condition, intended use, and calibration.
- Full-power testing should be completed on a suitable dyno and at a sanctioned track—not on public roads.
Build Your G80 M3 With the Right Supporting Parts
A 1200+ horsepower BMW G80 M3 build is a system, not a shopping list built around one headline component. Start with Bryan’s complete G80 M3 build breakdown, review the linked turbo, fueling, camshaft, DME, and controller options, and contact the Kies Motorsports team to confirm fitment before ordering.
Shop Kies Motorsports and build around your vehicle, goals, and qualified tuner—not a guaranteed dyno number.