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Twin box exhaust??

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Anthony

Post subject: Twin box exhaust??

Posted: Wed May 16, 2018 8:37 pm

848cc

Joined: Mon Nov 20, 2017 9:16 pm
Posts: 26

Another exhaust question.
Does anyone know what the story is with twin box exhausts on a cooper s?? Were they standard or an option?? I heard they came in with the mk II?? I guess it's just to keep it a bit quieter?? Can anyone throw any light on it??

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winabbey

Post subject: Re: Twin box exhaust??

Posted: Wed May 16, 2018 9:38 pm

1360cc

Joined: Wed Oct 03, 2007 9:04 pm
Posts: 6651
Location: Melbourne, VIC

The Service Liaison Summary produced when the upgraded specification MK II Cooper S for NSW Police was released in late 1970 (SPO41) mentions the removal of the resonator as per the Mark 1 Cooper S, so a two box system would appear to have been a standard fitting on the MK II.

I'm fairly sure the MK II Cooper S I bought new in 1969 had a resonator in the middle.

This may have been discussed on here previously. Perhaps try the search function?

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SLS 212 Oct 70 v3.jpg

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_________________
ex-NSW Police 1970 MK II Cooper S
VMCI #43

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