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I'm looking to get a new mandrel bent aluminised mild steel exhaust system for my GU TD28. I've had a look at Scott's Rods system which is 3" and the Beaudesert Exhausts system which is 2 3/4".
My main goal for the new exhaust is for more power and to work well with a DP chip along with having a deeper sound etc. But which exhaust should I go for? What's the difference between the sizes?