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Old 11-16-2012, 05:28 PM
RonJeffries RonJeffries is offline
Registered User
Location: Michigan
Join Date: Nov 2012
Posts: 3
Mein Auto: 2007 335i Convertible
135i performance upgrade?

New member. Have 2007 335i convertible, planning to (up or down?)grade to 135i convertible with 7 speed.

I don't want to go IS because I live in Michigan, where we no longer have actual roads, so I think the IS suspension would kill me.

However, I am told you can get a dealer upgrade to the additional 20HP of the IS. I assume this is mostly a chip change, but what little I can find on the web suggests that there are things one should order on the 135i to ensure best results.

If anyone knows anything about this, or has links that would be useful, please let me know.

P.S. If you need a 2007 335i Convertible, let me know.
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