massiveCoRbyn
ClioSport Club Member
Several
I can't seem to find the pictures I had under the car unfortunately, but this is the exit:
IMG_20170507_163653 by Jon Scoltock, on Flickr
You can see in this picture that it drops down to come out under the side skirt on my car. I didn't want to cut the sill on mine, mainly because I was lazy. Something I might do in the future if I can be bothered.
The 2019 Snetterton Stages 6a by Jon Scoltock, on Flickr
Can't find details of the old silencer I was using, but this is what I have now: https://www.jetex.co.uk/custom-exhaust-parts/U336300/
I also made four of these out of 1mm plate:
IMG_20181113_171503 by Jon Scoltock, on Flickr
I started with just two, but was still borderline, so added two more. On my car, they are between the silencer and the exit. I just cut a slot into the pipe, slid it in and welded. Then put the next one 3" away, rotated 180 degrees, then another 3", rotated 180 degrees again. As I said, using two got me from 102dB to about 100. The second two got it down to 97dB.
The system itself uses the standard RS2000 4-2-1 manifold, no cat (because Q-plate) and a 2.25" system with the exception of the box, which is 2.5" (because no one did a 2.25" box in the size I needed. It's all heat-wrapped too - the manifold and whole system, excluding the silencer. The main reason for doing the system was to stop the tunnel getting hot, as I don't have any heat shields.
Worth keeping in mind that the MSA Yearbook stipulates that you should be a certain distance from any walls, as it could impact the result, so being near a wall might be influencing things.
You can see in this picture that it drops down to come out under the side skirt on my car. I didn't want to cut the sill on mine, mainly because I was lazy. Something I might do in the future if I can be bothered.
Can't find details of the old silencer I was using, but this is what I have now: https://www.jetex.co.uk/custom-exhaust-parts/U336300/
I also made four of these out of 1mm plate:
I started with just two, but was still borderline, so added two more. On my car, they are between the silencer and the exit. I just cut a slot into the pipe, slid it in and welded. Then put the next one 3" away, rotated 180 degrees, then another 3", rotated 180 degrees again. As I said, using two got me from 102dB to about 100. The second two got it down to 97dB.
The system itself uses the standard RS2000 4-2-1 manifold, no cat (because Q-plate) and a 2.25" system with the exception of the box, which is 2.5" (because no one did a 2.25" box in the size I needed. It's all heat-wrapped too - the manifold and whole system, excluding the silencer. The main reason for doing the system was to stop the tunnel getting hot, as I don't have any heat shields.
Worth keeping in mind that the MSA Yearbook stipulates that you should be a certain distance from any walls, as it could impact the result, so being near a wall might be influencing things.
bought them together with diffuser (that’s for sale but nobody wants) in November. 
