vsrf Catless downpipe no tune?

justnicor · 11-07-2025, 11:45 AM

i just bought the catless down pipe and i was wondering if it was safe to run without a tube , i dont mind the p0420 because i already have that code on stock cat but i was wondering if i could damage the engine running no tune

jb-slow · 11-09-2025, 10:47 PM

Won't hurt anything

srosenlaw · 02-21-2026, 05:36 PM

As long as you're fine with the O2 CEL...

11-07-2025, 11:45 AM	#1
justnicor Registered 0 Rep 1 Posts Drives: m235i Join Date: Nov 2025 Location: USA iTrader: (0)	vsrf Catless downpipe no tune? i just bought the catless down pipe and i was wondering if it was safe to run without a tube , i dont mind the p0420 because i already have that code on stock cat but i was wondering if i could damage the engine running no tune
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11-09-2025, 10:47 PM	#2
jb-slow Lieutenant 145 Rep 421 Posts Drives: m235i Join Date: Mar 2019 Location: puyallup iTrader: (0)	Won't hurt anything
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02-21-2026, 05:36 PM	#3
srosenlaw New Member 2 Rep 5 Posts Drives: 2014 BMW M235i; 2018 BMW X2 Join Date: Feb 2026 Location: Florida iTrader: (0)	As long as you're fine with the O2 CEL...
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