The BMW E21 M3 is a model that only exists in the dreams of the BMW Motorsport fans.
https://bit.ly/4gUuuPg
However it can become a reality, by doing a simple engine swap.
Shoehorning the S14 engine and gearbox into the E21 chassis is one of the most straightforward, smooth projects for the BMW cars.
Supersprint has the perfect exhaust for the task, with a dual pipe, 50mm oversized diameter system that bolts on to the BMW factory tubular headers of both the 2.3L and 2.5L Evo engines.
Once the swap is done, just put the Supersprint exhaust on and go; it cannot be any easier.