I'm also in the same boat as you... and I also drive a mazdaspeed 3 gen1. I owned two bmw's prior to purchasing the speed and, while I love the car, I'm looking to get back into a bmw; and there really doesn't seem to be a better choice than the 135i. It seems like the n54 engine gets much better power gains mod for mod, my speed 3 is making 300whp and I have put in a fair amount of work; i've seen the 135i hit 300whp with just a stage 1 tune with the cobb ap; pretty amazing
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