7 replies to this topic

[Mini_Alex]

I bought the following twin box exhaust kit a few weeks ago : http://www.minispares.com/product/Classic/Exhaust_and_manifold/Exhaust/Exhaust/RC40PACKAGE002.aspx?110201&ReturnUrl=/search/classic/rc40.aspx%7CBack%20to%20search

However It all fitted very well apart from some blowing in areas of the exhaust, however I am finding that the silencer box is scraping on speed bumps even though it sits all flush under the car. So I am gong to be buying a single box instead, is this the right pipe for the single box from the manifold? - http://www.minispare...09.aspx|Back to

The manifold is the standard rc40 one in the kit and i think its made by fletcher.

Is there anything else I will need to buy to covert it to a single box.

My car is a 1983 Mayfair.

Thanks in advance

Alex

Edited by alexcumbers, 21 December 2012 - 01:04 PM.

[freaker]

yes should be fine,

you may need to cut it down depending if you have a freeflow or an lcb manifold

freaker

what are you doing with your other one ?

[Mini_Alex]

Ok thats good news then, thanks.

The twin box will probably go on our other mini when thats back on the road as that will be riding a bit higher, I will have to wait and see.

Alex

[KernowCooper]

I'm in the process of taking off a newish RC40 twin box as we speak and putting on a matching Maniflow single box to the Stg2 Maniflow LCB, more so because the RC40 Twinbox is so quiet and the center box just touches when it goes in the garage.

[Mini_Alex]

Well I'm glad someone else has had a similar experience, It was very annoying today as i was going over a speed bump slower than pushing the car and yes I agree it is a lot quieter than i thought it would be.

[Cooperman]

If the RC40 centre box hits the ground but you still want to keep the car fairly quiet, the Maniflow 'cherry-bomb' is a good centre box to fit to the RC40 back box. I have had problems witht he RC40 centre box on rally cars as it does sit a bit low.

[Mini_Alex]

Just looking under the car you can see it is a bit low near the silencer, the question is are single boxes a lot noisier?

[Cooperman]

Yes, a single-box RC40 on a 1275 is rather noisy and it's so much better with the twin box.
My Innocenti has the twin RC40 system and at standard ride height it's not too much of a problem. The entre box is qhite a large diameter though and it can't be 'tucked away' like the rear one can.