Performance upgrades

[Bimmerguy20740]

Hi, i have an '89 325i convert. and i was just wondering what are some cheap upgrades of mods that i can do to get a little omre power out of the stock e30 motor.
Thanks

[Addissimo]

I would post this in general technical.

chip
cold air intake
exhaust
ebay electric supercharger + hp mod (duh)


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