Thread: m40i downpipe
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      10-04-2019, 04:08 AM   #19
habib86
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Drives: alpine e89 23i
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Quote:
Originally Posted by Joe240 View Post
With a cat less DP you will definitely get a CEL. With a sport car DP it can be 50/50. Usually an O2 spacer helps if it shows up
thats why im waiting on bootmod3 as thy will send me a stage 2 tune ( so no cel since its tuned )

if ur getting a downpipe u might as well tune the car as well