Looking for opinions on this 2014 BMW 335i N55 M-Sport – potential daily driver  
I’m considering buying this car and want some experienced input. Here’s everything I know so far:  
Car Details  
•  2014 BMW 335i N55 M-Sport  
•  Glacier Silver Metallic  
•  Clean title  
•  117k miles (mostly Texas highway miles)  
•  Non-smoking  
•  VIN: WBA3A9G53ENS64451  
Current Setup / Mods  
•  MHD Stage 2+  
•  XHP Stage 3  
•  CTS inlets/outlets  
•  Charge pipe  
•  7” Race Core FMIC  
•  EKP replaced and coded  
•  4” catless Evolution Racewerks downpipe  
•  M3 poly motor mounts  
•  BC Racing Superlow coilovers  
•  Upgraded bigger rotors  
•  Apex ARC-8 wheels  
•  Carbon trunk lip  
Current power: \~380 hp  
Also includes:  
•  2 Michelin tires in good shape  
•  OEM exhaust + modified 4-tip M2-style exhaust  
•  OEM rotors and OEM struts  
Maintenance / Refresh (done less than 10k miles ago)  
Seller has receipts and photos of the work. Claims he did everything himself (he’s an engineer with 15+ years working on cars):  
•  New OEM turbo + turbo lines, gaskets, and hardware  
•  Oil pan gasket & hardware  
•  Intake manifold gaskets  
•  Throttle body gasket  
•  Oil filter housing gaskets & bolts  
•  Aluminum coolant flange  
•  High pressure fuel sensor  
•  MAP sensor  
•  Injectors replaced and coded  
•  Valvetronic motor + accessories (new OEM)  
•  Spark plug recess gaskets  
•  Heat exchanger  
•  Valve cover gasket  
•  Coils and spark plugs  
•  Fresh oil change (5W-40, very low miles on it)  
•  New OEM multimedia screen  
•  New windshield (HUD works)  
•  Front bumper repainted  
Compression: 210 psi across all cylinders (seller’s claim)  
Previous High-Power History  
•  Previously ran a full-frame single turbo  
•  Made 680 hp (seller says this was conservative and not maxed out)  
•  Ran that setup for about 6 months  
•  Seller says it was a daily for a while, then became a low-use weekend car (out once a week or less, not tracked/raced)  
•  Claims he doesn’t beat on his cars  
•  Nothing internal was replaced (stock rods, pistons, bearings, etc.)  
•  Says he visually inspected the bottom end while doing the oil pan gasket  
•  Argues full-frame is much safer than a hybrid turbo (lower boost, lower EGTs, lower cylinder pressure, smoother torque delivery)  
•  States there were never any issues  
My Main Concerns  
I’m looking at this as a possible daily driver. The recent refresh and documentation look solid, and the current \~380 hp tune is reasonable.  
My biggest hesitation is the previous 680 hp on a completely stock bottom end with no internal work, even though it was only for \~6 months and compression is currently strong.  
Questions for the community  
1.  How concerned should I be about the rods/pistons/bearings given the 680 hp history + 117k miles?  
2.  Does the strong compression + lack of knocking + visual inspection during the oil pan job give reasonable peace of mind for daily use at \~380 hp?  
3.  Would you daily this car, or would you walk away?  
4.  Anything specific I should have checked during a PPI?  
Any input from people who’ve owned high-power N55s (especially ones that previously ran big single turbos) would be really appreciated. Thanks.

2014 335i advice