I have a stock 2013 x5 35i xdrive with the n55 engine. My car has the m sport package, which gives the car 315hp and 330 torque. My question is can I run the ngk iridium spark plugs on my stock engine? I am also using the Delphi coil packs?

We would not recommend a step colder plug for your application.

(2017 BMW M4 Competition) Are these ok to use as a replacement for stock spark plugs? Car is not tuned, and I do not plan on having it tuned any time soon. I just need stock specs, will these work? or is there is there a different spark plug that I need to use?

These are not meant to be used for stock applications and under factory fuel maps will likely cause the vehicle to run worse. Stock S55s run with the OEM Bosch plug BOS-0242145541.

Hello, i want to buy this for my 2014 BMW X5 35i, can i request you guys to pre-gap it to the correct gap, when i make a purchase?

We are unable to accommodate custom gap requests. That would need to be done by the installer and it takes only seconds.

Does this have a specific torque spec or do I just go based off of bmw recommended torque specs for my specific model

Yes, simply follow the BMW spec.

Can I use this 1-step colder spark plug for stock BMW n55 engine or is it only recommended for tuned engines?

The colder plug is meant for higher boost/hp applications.

(2014 X3 35i) Could I use just 91 w/ ethanol or do I have to only use non-ethanol gas in order to run these spark plugs?

Yes, this is intended for use with normal pump gas.

Do they already come pre gapped for 135i n55?

This spark plug comes pre-gapped at 0.30 in.

I have a bmw 435i and was looking to run ngk plug on my car was wondering what’s the right gap for these plugs

Please see your vehicle fitment notes (fitment guide) for the recommended gap information.