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I had a 3.62 in my E46 330Ci 6MT. Stock was 2.97. The difference was incredible, the car felt like it had a mini supercharger lol. The ratios are the same to our N/A 6MT E90s, the added performance was huge. The only downside was a hit of approximately 25mi lost in range per tank. BMW put a taller final drive in the 330i vs. 328i, I suppose to offset the slower 328 engine setup.
You'd be going from 3.15 to a 3.64 which should be lots of fun and useful, pretty much exactly what I had in my E46 with no regrets.
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'16 M3 | '23 718 Spyder
Past: E92 M3, F87 M2, E39 M5, etc |