Discussion
The noise level inside the car is still really quiet, but when accelerating, you can definately tell it's a V8. It sounded like a Dyson with the standard boxes in! There isn't any droning, even on a long run.
As for cost, I wouldn't have a clue as my mate and I did the mod in my garage. The original back box is retained, the only materials used were two short lengths of 2 1/4" stainless pipe left over from a previous project. The new bits were tack welded in-situ, then I dropped off the whole cat-back section and seam welded it all up. The hangers were cut off the old boxes and welded onto the new pipes. Only took about 5 hours, including a mad dash to get MIG wire after we ran out and about a gallon of tea.
As for cost, I wouldn't have a clue as my mate and I did the mod in my garage. The original back box is retained, the only materials used were two short lengths of 2 1/4" stainless pipe left over from a previous project. The new bits were tack welded in-situ, then I dropped off the whole cat-back section and seam welded it all up. The hangers were cut off the old boxes and welded onto the new pipes. Only took about 5 hours, including a mad dash to get MIG wire after we ran out and about a gallon of tea.
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