Hi guys,
New to the forum, usually a lurker but I have a question which I have done some research about but I'm not 100% sure about.
I have a fg xr6t with supporting mods making 470rwhp. However the car drones way too much at highway speeds even though I have a cat, mid muffler and rear muffler. Recently I replaced the rear muffler with the stock 3 inch muffler. I assume ive lost power but would this be a substantial loss?. Doing some research suggests that it shouldn't harm the engine.
I prefer the quiet sound while cruising around. I have a varex on the way which ill probably install but if the stock muffler does the job is it worth putting a 3.5inch varex rear muffler?.
Tl;dr - Is it okay to have an exhaust go from 3.5inch turbo back to 3 inch even with power upgrades.