7 replies to this topic

[Carvell]

Hello,
I have a standard mpi manifold, standard downpipe and then standard cat. I want to fit a 1.75" RC40 single box side exit exhaust in stainless steel. I can't work out which parts I need from mini spares. They seem to list three part numbers for the back box and I'm unsure on which link pipe.
Thanks

[slidehammer]

If you have an MPI car you will need to retain the cat or at least refit at MOT time to meet emissions and then it looks like you need a combination of these 2 parts.

RC40 057 (for single box system) from cat to single back box or RC 014 first silencer to rear box (for twin box system)

then RC40 051 side exit back box. I personally would go twin box (even though the first box seems to be mild steel as Minis are loud enough anyway! 

 

 

 

 

 

 

[Carvell]

I've just bought a new cat so yes I'm definitely keeping it. I have a mild steel single box rc40 at the moment. I will have a look at the twin box.

[Carvell]

So is it:
RC40-051 & RC40-062
Is that a full twin box side exit stainless exhaust?

[Itsaminithing]

Wise choice to go for a twin box as slidehammer suggested. Stainless RC40's are louder than the mild steel versions.

I went for the RC40-062 & the RC40-053 (not much different to the RC40-051 but that tailpipe does look sexy).

My Tahiti Blue S reg MPI is slightly modified: maniflow LCB, Piper 270i cam etc but this rolling road vid will give you an idea of how it will sound

(some of the others sound better -but they were very expensive massively re-engineered units).

...............

You can tell which is the correct car as you can see me having kittens in the background!

Edited by Itsaminithing, 04 March 2017 - 12:21 PM.

[Carvell]

I have ordered RC40-062 and RC40-051. Fingers crossed

[jamesmpi]

http://minispares.co...ge.aspx?1~7~208

Am I right in saying that on the 053 version the diameter of the pipe is 2.25" from the silencer to the rolled top? But the pipe connection into the back of the silencer is 1.75"?

Edited by jamesmpi, 14 March 2016 - 09:17 PM.

[Itsaminithing]

http://minispares.co...ge.aspx?1~7~208

Am I right in saying that on the 053 version the diameter of the pipe is 2.25" from the silencer to the rolled top? But the pipe connection into the back of the silencer is 1.75"?

 

Yes, 1.75" inlet connects to the RC40-062 middle box (same as the RC40-051), it's only 2.25" for the tailpipe section so there's no (noticeable) loss of power that you would get using big bore exhaust systems that are too large for most road-going cars.

The bigger bore tailpipe gives you a slightly louder/throatier exhaust note than a standard pipe end -but it's not silly loud.