Knfr

I recently rebuilt my car with new engine after a timing belt failure..,/ Upgraded RS4 tbo, IC, SS headers etc etc.. (034 Stg3). Anyway now Im facing the common dilemma of loose header nuts. I was able to access all the passenger bank side nuts except the lower nr3 Cyl nut (Closest to firewall under header tube).
Anyones got any good ideas on how to access this nut without pulling the engine..? Perhaps removing bumper or lowering the subframe?
The car sounds like a Tractor at the moment and Im positive the leak is here since eliminating the spark from this Cyl "Cures" the problem.

Thx for any suggestions!
-Fred