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BMW 3-Series (E90 E92) Forum
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will a secondary cat delete affect smog & aatune
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10-31-2011, 03:00 PM | #1 |
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will a secondary cat delete affect smog & aatune
basically like title said, if i deleted my secondary cat will it affect me passing smog or affect my AA tune. i have a 06 325i, thanks in advance
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10-31-2011, 03:14 PM | #2 |
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I have the aa tune and i deleted my 2ndary cats after the tune and wow i felt a big diff on top end from 4.5k to 6.5k if anything i think it helped. and the effect on smog im sure it dose but its not as noticable as if u were to delete the main cats. im going to my buddys kwik kar lube center they do inspections hes gonan run my car like if it was a 95 pre to measure the 5th and 6th gasses. so ill let u know
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11-11-2011, 11:47 AM | #5 |
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Eisenmann said emissions test should pass with their set up and I only have my primary cats on. Won't be doing smog yet until next september though.
http://www.e90post.com/forums/showthread.php?t=608932 |
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11-13-2011, 10:41 AM | #7 |
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does your shop get rid of them? if so, how much do you charge?
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02-05-2012, 06:59 PM | #9 |
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02-06-2012, 12:28 AM | #10 |
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no problems here. However, thats NC emissions. I am running no 2nd cats, no res, and AA tune. Absolutely love it.
Do it.
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2011 335i Sports Package | VRSF FMIC | Cobb AP3 | Dinan Exhaust | BMS Intake | VRSF CP | Lux H8 Angel Eyes | Mtec LED Fogs |
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