IND as a company is nothing if not extremely fortunate. The original Green Hell Portfolio Project was born shortly after an unforgettable trip to Germany, the home of BMW and the center of European motorsport culture. That annual pilgrimage helped inspire the first version of Green Hell, a car built as a tribute to racing, the Nürburgring, and the pursuit of speed.
For additional history, the original Green Hell build thread can be viewed on Bimmerpost.
Green Hell was always about pushing the limits of what was possible in a street-driven BMW E92 M3. Nearly two years after the car was first built, the owner returned to IND with a new goal: push the project even further. Fresh off another trip to Germany and the Nürburgring, our team had new inspiration, new energy, and a clear direction for the next evolution of the build.
For us, Green Hell represented more than a fast car. It represented the constant chase toward a moving target, the desire to be faster, sharper, and more capable than before. Although Green Hell would remain a mixed-use street car and track day weapon, the mindset behind the project was deeply rooted in motorsport.
Once again, the focal point of the project was the engine. Fed compressed air by an ESS Stage 2 supercharger kit, the S65 engine in Green Hell became an absolute monster. With more than 530 horsepower reaching the rear wheels, every supporting modification needed to be planned around managing that power.
Acceleration in an ESS-supercharged M3 is not casual. Triple-digit speeds arrive quickly, and the car demands attention, planning, and respect. IND’s goal was not simply to make Green Hell more powerful. The goal was to make the car better: more controlled, more forgiving, and more capable of using its 600 crank horsepower at speed.
Green Hell was an early adopter in the U.S. E9X M3 community. Although some ESS-supercharged M3s were already being used on track in Europe, supercharged E9X M3 track builds were still uncommon in the United States when the car was first developed.
During the car’s first season, Green Hell produced strong lap times, but we quickly learned that the power from the ESS Stage 2 system was not something to take lightly. Putting that power down while exiting corners on 285-width Nitto NT05 tires was challenging, and we knew the next phase of the build needed to focus on grip, balance, and control.
Mechanically, finding more corner-exit traction became the central mission. We needed to create a car that could better harness the power of the supercharged S65, especially under track conditions.
The first major step was widening the already generous rear quarter panels. The original sheet metal was carefully pulled and reshaped to create roughly one additional inch of wheel clearance while retaining a subtle factory-style shape. The widened rear arches allowed Green Hell to run 315-width rear tires with far greater confidence.
IND contacted BBS Motorsport for a set of E88 wheels, one of the most respected motorsport wheels available. The E88 is rarely found far from a racing circuit, and its three-piece construction, strength, and serviceability made it an ideal choice for the project.
To give the wheels a distinctive IND touch, the normally polished outer barrels were finished in gold to match the wheel centers. The final sizing was 18x9.5 +19 front and 18x10.5 +19 rear, allowing the car to run a 275-width front tire and a 315-width rear tire setup.
With the wider tire package established, suspension tuning became critical. IND selected KW ClubSport coilovers and RD Sport sway bars to provide the adjustability needed for ride height, alignment, damping, and balance. The adjustable sway bars gave the team additional control over the car’s understeer and oversteer behavior.
Challenge Engineering also used Green Hell to debut their aluminum adjustable rear toe arm kit, helping maintain precise alignment and maximize rear traction under load.
The next step was aerodynamics. While the previous version of Green Hell retained a more street-friendly appearance, the new performance goals required more serious aerodynamic support.
Challenge Engineering supplied their GT3 front aero system, including a modular front lip and Carbon-Kevlar splitter. Motorsport24 sent an aggressive trunk and rear wing setup from Germany, adding much-needed rear downforce. The wing was mounted in a way that allowed the trunk to remain functional while minimizing movement and deflection.
IND also fabricated a tubular reinforcement bar tying the wing uprights together, increasing rigidity and stability.
Due to the aggressive M24 wing and trunk setup, the initial plan was to delay adding a rear diffuser until the following season. That changed when Andreas from Vorsteiner shared photos of the new GTS-V diffuser. The design was a perfect match for the more aggressive rear of Green Hell, with deeper fins and character lines extending toward the sides of the rear bumper.
The Vorsteiner diffuser completed the rear of the car while framing the Eisenmann exhaust beautifully.
M24 also contributed their high-performance radiator and oil cooler. Although the factory E9X M3 cooling system is already robust, the oversized cooling components helped ensure Green Hell could run consistent laps in demanding weather while giving the driver added confidence to push the car harder.
Once we were confident in the car’s ability to manage the supercharged S65’s power, our focus moved to braking. Brembo’s 365/345mm GT kit had already proven itself through two seasons of track use, both while Green Hell was naturally aspirated and after the supercharger was installed.
To add more brake torque and better support longer track sessions, IND selected Pagid RS29 pads for extended lapping and Hawk DTC70 front / DTC60 rear pads for days when maximum braking performance was required.
With the mechanical package coming together, the aesthetics of the reborn M3 became equally important. Green Hell had already established its identity, so the goal was evolution rather than reinvention.
Porsche GT3 Signal Green moved from accent color to full exterior color, reflecting the more extreme performance and bodywork changes. The original pinstripe returned in a more subtle black finish, while BMW Edition front and side grilles with IND tinted lenses completed the exterior without distracting from the theme.
The Signal Green theme continued inside the car with painted interior trim. A gloss black roll bar with Signal Green metallic flake, an OMP steering wheel, IND shifter extension, and custom upholstered Sparco Pro 2000 seats created a cockpit that worked equally well on the street or track.
After several months of work, Green Hell was complete. When the client first saw the finished car, his reaction made every hour worth it. The smile on his face confirmed that the project had succeeded visually and emotionally.
But the real test would never happen during delivery. Green Hell had only one true proving ground: the track.
Once again, we returned to Autobahn Country Club for the first shakedown. Supercharging an E92 M3 makes it brutally fast in a straight line, but a true track car must be able to put that power down through corners, braking zones, and imperfect conditions.
The weather was far from ideal. Late October brought cold temperatures, gray skies, and rain in the forecast. Track temperatures struggled to reach the 50-degree range, but we moved forward. After alignment, corner balancing, and tire pressure setup, our test driver took the car out for its first laps.
As the tires warmed and the driver gained confidence, Green Hell’s lap times dropped steadily. The car showed tremendous grip, strong braking performance, and a much better ability to control the supercharged power delivery.
Unfortunately, rain arrived before we could complete the full tuning plan. Even with street tires in wet conditions, Green Hell performed flawlessly. The test driver managed an approximate 1:16 lap on Autobahn’s North Course in soaking wet weather with very little time in the car. For reference, the same driver had run a 1:07 in a 996 GT3 Cup Car on Hoosier slicks in dry conditions.
The shakedown was cut short, but the results were extremely encouraging.
Of course, Green Hell was still not a dedicated race car. It retained a full interior, navigation, air conditioning, sound system, and the comfort features needed for true mixed use. Lap times, for that reason, were never the only goal.
The real goal was to build a car that was compliant, forgiving, easy to drive at speed, and brutally fast when pushed. On its first test day, Green Hell proved it could do exactly that.
For enthusiasts looking to explore BMW E92 M3 upgrades, builds, and platform-specific parts, visit the IND BMW E92/E93 M3 Collection.
