Feels about the same. Maybe a slight mechanical noise when they open to dump boost. The real reason is less chance of failure and also addition of meth if you want (which I haven't)
08 335i e90 TiAg/Black, Premium, Sport, Step, Cold Weather, BMW Perf. shifter/e-brake, M3 lip spoiler, blacklines, aFe intake, VMR 710s, Gloss black vinyl trim, black 3.5" DiMisa tips, Procede V5, ar Design OCC, ETS 5" intercooler (black), MTech wheel, rear bumper, and side skirts, Stett CP, Forge DVs, LUX 5.1, Ground Control Coil-overs, OEM split armrest, Raceland catless DPs...