fine tuned N/A motors really don't gain much from minor bolt-ons.
Intake/Exhaust really is supposed to be the "first step" upgrade in order to support increase in power from major power modifications. Not a priority step to gain real hp/tq out of it. F/I cars benefit alot from just basic bolt-ons. So if you are looking for power, look into serious N/A power tuning or forced induction(Turbocharger/Supercharger) first. Worry about I/H/E later.
Now, if you are just looking for sound, eisenmann exhaust will do a VERY good job.
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06 AW E90 330i ZPP/ZSP/Step/Expired Warranty
: Prior Design Front : ACS Rear : ACS Roof : BlackLines : Simota Intake : Carbon Fiber Interior Trim :
: MTEC V3 : 24% Charcoal : V1 Hardwired : Solaris Invisibulbs/LED interior :
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