Sorry ukrcan, left out my exhaust bit from your previous post...

I retained the factory 3.0 system as I like how discrete it is. To install the 4.8 tips I had a set of Y-pipes whipped up to which we welded a flat 1/4" steel flange with the appropriate circles cut to slip the outlets of the Y through. It was all welded from the back side before being welded into the tip itself. I did it that way so you can't see through the tip....a more 'factory-ish' look one could say.

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