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      08-12-2021, 03:24 PM   #20
SteveChester
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Drives: F82 M4
Join Date: Oct 2009
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2014 BMW F82 M4  [0.00]
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Originally Posted by barryc365 View Post
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Originally Posted by SteveChester View Post
Does this retain the secondary cats ?
No, it removes them but no CEL.

Do you need to retain it in California or something? Maybe they will have a version for that. I was looking at Supersprint also and they have a high flow cat version it looks like also but it's more expensive for the cats obviously
No for the UK annual MOT test - if you put catless downpipes and that exhaust you'd have no cats so it would not pass the emissions test.

Catless downpipes more important for any stage 2 type map I think so interested to see what other combo you could run and still pass.

I'm currently running catless downpipes, MPE and Bootmod3 stage 2 map on the F82 platform.
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