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custom exhaust?
Gents, I need your consul on a two tier issue:
A. A local custom shop with an excellent reputation and skill set wants to build a custom exhaust set up for my M3. This includes two options.
1. keep the primary cats but delete everything else and build it from the primary cats back with 3" type pipes and build a custom x-pipe as well.
2. delete all factory cats and go with two racing cats built with above setup. This option is around 800.00 more. Doing this requires ECU work to remove the CEL error.
Is their a decent gain if I leave on the primary cats? I would prefer not to spend the extra 800ish right now.
Your advice and thoughts are appreciated. Phil if you read this its MAYCO performance shop on Bellaire.
Thank you gents.
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