I no longer have the car pal, but I had a miltek 3" cat back on and was getting a rear section custom built the noise was just the same as I had the DPF still, I'd go custom as in the pics above there is a small metal lip where the heat shield is they will either have to build it to bent around it or cut it out.Cheers dude.
I like keeping it fairly local so they seem a good idea.
Can I ask which exhaust system you have and if it's really loud?
I have 2 kids and need to be reasonably respectful on the school run.
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