Quote:
Originally Posted by tim_s
The undertray was just off ebay, there are loads on there.
Do you have an n52 then and not an n53? The gains on an n53 of over 50bhp are obviously quite significant.
I was actually really impressed at the factory air filter on the n53, would be surprised if there are any gains at all to be found there.
How do you find the BMW performance exhaust?
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I'm down the road from Promap in Chester, if I keep my N53 325i I'm going to get them to look at remapping it as they have proven gains, 265+ is common. I currently have problems where the engine management light comes on most morning on cold start, error codes from my mechanic are something to do with mixture, and something to do with catalysts, have you had anything similar?