Slammed Ek9

i have a 96 ek hatch on 16's slammed to the ground i currently have an unbolted exhaust due to bumps hitting my stock muffler im about to order an hks univeral hi power ti exhaust but dont know which canister to get.. the 130mm or 170mm my question to you guys is that if which one would sound best if there is a difference between the two and if i get it customed to where i they angel the exhaust will it scrape cause my car is so low....... in my opinion i want the 170mm can... what do you guys think...... is anyone out there running a 170mm angled exhaust with a slammed car??? thanks in advance