How to inrease the horsepower of a bmw 335i sedan?

i have a 2007 bmw 335i and i was just wondering what's an easy upgrade for better horsepower and torque?



thank you, your help will be appreciated!How to inrease the horsepower of a bmw 335i sedan?how much do you want to spend? there is a few easy upgrades that would give you a day-night difference, to list some.



*Cheapest:



Spark plugs

Cold Air Intake (this can give you around 6hp or little more)



*Not so cheap but also not exaggerated



Headers (this can give you around 10hp increase or more)

ECU/Chip (this is a great deal, around 17hp increase)

High Flow Cats and a exhaust system (becomes more expensive)



If you care about my personal opinion the I'd say, Get a ECU reprogramming, a Cold Air Intake System (CAI) and you will feel the difference. Remember one thing takes you to the next, high performance upgrades can be expensive for this car, I would go with only those things for now, such as the CAI, ECU and Headers, you'll feel the change, you rcar will be different and then you will be able to think about whether you want more or not, thats where deep pockets are needed.How to inrease the horsepower of a bmw 335i sedan?
Active autowerks software upgrade. With just this software you can get a proven 71hp boost and 85ft-lbs of torque. Well worth the money in my opinion. Check out their website below.



http://www.activeautowerke.com/viewprodu…



Other than that a K%26amp;N cold air intake system and a free flow exhaust will help too.How to inrease the horsepower of a bmw 335i sedan?Header(s), Full exhaust including HI flow cat, or no cat. performance chip, http://www.voloperformance.comHow to inrease the horsepower of a bmw 335i sedan?
Royal Purple 5W30, Wix oil filter, Denso Iridium Power Spark Plugs, Good Gas.How to inrease the horsepower of a bmw 335i sedan?A K%26amp;N air filter will make a difference and they are not expensive at all.