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      03-20-2015, 02:55 PM   #73
sales@ESSTuning
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Drives: ESS M3 / M4
Join Date: May 2007
Location: AZ

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Quote:
Originally Posted by Groundpilot View Post
BrewRifle, you are right about swapping back to stock cats in order to pass with ESS emissions file. AJ from ESS just responded to my email confirming that. Their service is top notch.
This is a must if you want to have the readiness set correctly. The only other option is our high flow cat X-pipe which will also work due to the primary cat placement and design.
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