The Bimmer F30 i335 presents a amazing foundation for driving upgrades. Several owners seek to maximize the engine's output. Common upgrades feature a modified air system, a cat-back system, and a remapping to boost https://f30bmwdashboard482464.wikiexcerpt.com/4807603/bimmer_f30_335i_engine_tuning_and_a_tuning_guide