Quote:
Originally Posted by pkancel
The stock sportline should fit with no issues. As for the spring rate, it should be different but thats what you want by going from the stock basic to the sportline. Stiffer spring rate. The odd thing here in the US, if you order HRs springs, exactly the same part numbers between the 335i and the 328i, so exactly the same spring rate, even though the 335i has a heavier engine.
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Like for like the spring rates are different for 328i & 335i, so if u just fit the springs from 335i into a 320i it may make things worse.