AE86 exhaust setup

[icedev]

Hi sifus's , need ur help on exhaust setup .
im using AE86 on a ke70 body . need to know wat is the best setup of exhaust system for this engine . my engine is stock , header oso stock . i want to know what is the best pipe diameter and what type of muffler to use . i was planing to use my stock header with 2inch piping with a center bullet then to a S-flow flow muffler maybe ard 2.3inch inlet . is it ok ..?

pls help , thank u