Pops and Bangs- Can you keep the secondary catalytic

[jay-12]

Cars that come with primary and secondary catalytic converters: Can you still have pops and bangs with out the primary cat but keeping the secondary cat in place. Car in question here is a BMW M4.

[pvogue]

No idea but i thought it was mapping to add the pops and bangs. Ask Evolemotorsport they can do it.

[vsonix]

I wouldn't bother removing cats, there's plenty of cost effective 100 or 200 cel race cats out there which keep you legal and still free up plenty of glorious noises.