R3 Exhaust Manifold

The standard exhaust manifold on the Clio 3RS looks pretty junk really, it’s a typical cast item so weighs a ton, has very short primaries and also an integrated cat, neither of these things bode well for making decent power. To make things worse it also has a couple of flexi pipes which are prone to failure!
On the quest to crack 200bhp and on the back of a healthy RR run, the fitting of my new R3 exhaust manifold along with a remap and sports cat should see this easily achievable 🙂

The manifold is a stainless R3 manifold produced by hand in Italy by Aros. Fitting to a road car however is far from straight forward…

  • The works R3 rally cars have solid engine mounts so fitting this manifold on a road car in place of the stock one (which has flexi’s) would mean it would crack. The choice was to either fit a flexi or convert the front joint to a sprung flange to allow movement.
  • The R3 manifold is also a fair bit longer than the standard item so finishes further up the car, requiring the Supersprint centre to be chopped.
  • I also needed a sports cat to keep things legal.

On investigation I found that the older Clio 182 uses a sprung joint, and a little further investigation found that the 182 Miltek sports cat uses the HJS 200cpsi HD core, and these are pretty much the best cats you can get. The 182 cats have a slight kink in them before the cat mind, so it would need cutting and welding back on straight!
So I ordered the cat along with a genuine Renault 182 fitting kit, I now had all the parts but none of the skill. An entire day spent a Tech 1 Performance and Paul has done a fantastic job fabricating and installing. I’ll let the pictures speak for themselves.

Clio R3 Exhaust Manifold Clio R3 Exhaust Manifold Clio R3 Exhaust Manifold Clio R3 Exhaust Manifold Clio R3 Exhaust Manifold

2 thoughts to “R3 Exhaust Manifold”

  1. Hi mate.

    What did you do about the front lambda sensor?
    I’ve just fitted this manifold to mine and have to relocate the front probe into the pipe behind the manifold.
    Did you do this with yours?

    1. Hi Tam,

      I had a lambda boss welded to it, pretty sure it was the front of the sports cat and the manifold was left alone. I’ll grab a picture and email it to you in the next day or 2.

      I am going to be trying a decat on the car soon to rule out the sports cat causing a pulse tuning/scavenging issue with it’s location just after the manifold. The top end of the car is currently very flat despite the cams, it is most likley just cam timing but I want to have a decat to try when it next goes for mapping and dial gauges on the cams etc.


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