This is the 1971 ETK Kc6 DRM (600 Platform, 390hp 3.4L Injected Inline 6 model). Here's some lore (it probably contradicts some current lore or might in the future, but i thought i would have a go and try it), skip to the bottom for more photos if you're easily bored:
The first ETK Kc6 was based on the 600 series and was intended to be a homologation special to satisfy the Deutsche Rennsport Meisterschaft (DRM) rules, which required a total of 5,000 cars to be built. It was presented to the public at the 1967 Frankfurt Motor Show and began production from March 1968 to June 1975. The E60 Kc6 was mainly produced in the coupé body style, but limited volumes of convertibles were also produced.
The front splitter, the rear apron, sill panels, as well as changes to the body in the area of the rear window (C-pillar), and the boot lid improved the aerodynamics. For aerodynamic reasons, the rear window was flattened and the tailgate was made of light, glass-reinforced plastic raised by approximately 40 mm for better airflow. The changes over the rear of the car resulted in lower lift forces and better straight-line stability. In addition, the windscreen was glued in – not, as with the other E60 series models, framed with a window rubber and piping. As a result, the Kc6 DRM achieved a relatively low drag coefficient of Cd=0.38 instead of Cd=0.42 as in the standard E600 Series. The only exterior body panels the regular 3 Series and the M3 shared were the bonnets, roof panel, sunroof, and inner door panels.
The brake calipers, rotors, and master cylinder were unique to the DRM model.
The transmission was a Getrag 265 5-speed manual. European models were outfitted with a dogleg version with close ratios and a 1:1 ratio for fifth gear. North American models used a traditional shift pattern and had wider gear spacing with an overdriven fifth gear.
In 2004, Sports Car International named the E60 Kc6 number six on the list of Top Sports Cars of the 1970s. In 2007, Automobile Magazine included the E60 Kc6 in their "5 greatest drivers cars of all time" under their 25 Greatest Cars of All Time.
Enough words, here are those photos i promised you:
So if you like the mod and the lore or find bugs/problems, comment about it below and remember to leave a review, now enjoy!