Dr_Jekyll & Mr_Hyde Estate Project

[zx_volcane]

dunno on twin tip vs single - depends entirely how its configured inside the box

normally something like 1 pipe in - perforated inside, that is next to the two pipes that exit - also perforated, and surrounded by sound deadening fluff.

have a quick look at google images, but loads of options.

Say best to phone up exhaust place and run them through your requirements, and they can knock something up to suit.