exhaust replacemant gu y61

[Tomdinneen]

hi guys just wonder on best exhaust system to use on my y61 running a 42td with an after market intercooler
dont know weather a straight through no muffer 3 inch [currently fitted] is the best option also stainless vs black planning on keeping her for a good few years yet any ideas??? cheers

[Hodge]

If it's already got a 3" system then that is already good enough imo. Can't say I've ever heard of anybody putting a larger system on a 4.2.
But I reckon you're good to go personally.

[Tomdinneen]

I don't want to go bigger just wondering if a cat converter or muffler would improve proformance