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6 Series DIY
6 Series Do It Yourself (DIY) forum.

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Old 06-21-2014, 06:33 AM
Hoser,eh? Hoser,eh? is offline
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Location: Meridian, MS
Join Date: Jun 2014
Posts: 2
Mein Auto: 2007 BMW 530i
ooh baby, ooh baby

I bought an 05 645i yesterday (35,000 miles) and on the way home from buying it was already thinking about what I cud do to it. Can anyone give me some experience based advice on cold air intake (do it yes or no?) and if performance chips are in general a good or bad thing. Do they threaten reliability in any way? Also interested to know if there are exhaust systems that make a dramatic difference in performance. Wouldn't be interested in making changes just to make car sound different/ better! Thanks
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Old 06-21-2014, 07:57 AM
Yorgi's Avatar
Yorgi Yorgi is offline
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Location: Toronto
Join Date: Mar 2005
Posts: 3,407
Mein Auto: '04 M3 / '06 650i Cab
Welcome and congrats on the new 6er.

For starters, you posted down in the DIY sub-section (for posting instructions on how to fix your car) so most people will not see your post - there is very little traffic in this section. Post general questions over here in the main E63/E64 forum.

I'll give you some quick answers but if you do some "search this forum" searches you will find endless info related to everything you asked about.

1. Cold air intake options are basically aFe (reasonable price, sounds great, probably no performance improvement) or the Dinan intake (expensive, small power improvement and slight increase in induction noise). Here is one thread on the subject, there are many more.

2. Chips for the 6er are not aggressive so I doubt you need to worry about reliability issues. Here is another thread, do a search if you want to see more options.

3. Exhaust upgrades will be mainly for increasing sound. There will be almost no improvement in performance - maybe a slightly better throttle response. There are many many threads on exhaust upgrades - the most popular option is to remove the front 3 resonators for a very slight increase in sound. The next most popular upgrade is Magnaflow exhausts.

PS - are you a CDN transplanted to Mississippi or just an SCTV fan?
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater

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