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UPGRADE- Chip and/or Air and/or Exhaust?? (archive)
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Posted by bkgondor on September 24, 2000 at 17:44:04:

Last year I bought a '91 318si with 122k miles for $6000. It was in excellent condition (a few dings) and fully serviced. I LOVE IT.
I am ready to do a performance upgrade. Last year, in these pages, someone suggested that the chip upgrade will be greatly enhanced by installing the K&N Cone Filter and also replacing the exhaust. Bavarian sells these items at $249, $154 and $679 (TriFlo), respectively. The questions are: Will they all work smoothly together (does chip need modification for improved air and exhaust)? As the whole package is around $1100 plus installation costs, do I really need all three? Which one or two items should be the priority? What are the latest opinions from the forum?

Also, I thought the 91 318is was an M30 engine, but I see many references in these pages to M42. Which is it??

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