just seen this, daniel, get a s4, get some exhaust place to make you cat back with cross over pipe with small (noisy) backboxes, it will be loud ish, then do what i did cut 2 pieces of pipe the length of the backbox, slip the pipe in to the back box and wedge or bolt in to place effectively cutting off the backbox and making it straight through, there you have your thunder and it sounds SOOOO good! on idle its got a very quiet rumble, rev a little you get a v8 growl, rev past 3k you get the thunder crack noise!
dont do cat bypass unless you want to get it chipped too as it needs to be coded out in the ecu to stop the CEL light coming on and limp mode coming on (main cats that is) other easy ish way to get noise is stock exhaust, take the down pipes off, smash the cats out of the down pipes and refit (you need to use lamda sensor spacers to move the sensors out of the way of the main flow of exhaust to stop the cel light coming on (the s4 runs 4 lamda sensors, 2 egt sensors also) stock system with down pipe cats removed but with main cats still in place will also give thunder noise! will make a video of mine tomorrow and post it up so you can hear the noise.
oh and insurance is 400 quid a year for me... im 27 no driving convictions.
if its a direct comparison our 172 cup doing the same journey in the same traffic is doing 32mpg
