Mpg improvement after cat delete

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Sep 17, 2018 | 03:29 PM

djs801

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From: Colorado

Mpg improvement after cat delete

i got Ppe headers catless and I gained 5 mpg..? Before I was getting 19-21 and know I’m getting 24-26 lol

Sep 20, 2018 | 02:21 PM

Gville350

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From: South Carolina

Sounds like your cats might have been clogged!

Does CO have emissions testing though?

Sep 23, 2018 | 11:16 AM

2013FSport

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From: OR

You relying on car computer or miles traveled and pumped refill volume? Given there were *no other changes* that seems excessive like it could be lean now.

You have any apps to monitor AFR, load, and IGN advance???
Also, what did you do with the O2 sensors? You running the 90° fouler or electronic O2 simulators?