Not sure if you have already ordered the Wave Trac? I have on in my car (previous owner installed). It has a 3.46 ratio, up from the factory 3.32 ration with the manual transmission, as you know. The highway revs are quite high, and while fuel economy isn't my priority, it is a bit loud with the performance exhaust. Also, when it is slippery out (snow/ice), I find that I am better starting from a standstill in second gear. I do like the extra 'dig' most of the time but am not sure I would want 3.73. I'd like to have the 7-speed DCT to bring highway revs down a bit!
Just something to consider.
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E9x M3 front & rear suspension arms; BMW Performance brakes upgraded to drilled rotors in rear; BMW performance shifter; BMW Performance Exhaust; Wave Trac LSD with modified 'nannies'; BMW Euro Intake box; BMW Aluminum Strut Tower bar; ECS front and rear sway bars; 3 stage intake with BPC software; BMW style 78, 17 x 8" wheels with Bridgestone RE 980AS 225/45-17 tires; Koni Special Active struts/shocks, E9x M3 RTABs.
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