PCW Exhaust mods

An exhaust mod/modification can be anything from a full straight pipe system, to a simple resonator delete, so a better question may be "what is a pcw exhaust mod?" or "what is a modified factory exhaust?"... in that case then it always involves removing the factory system from the car and opening each section of that factory system (backbox, resonator, catalytic converter etc) from above to gain access to the silencers internals, once inside you can manipulate the pipework/baffles to gain better flow which (when done properly) gains more volume and a better tone. when the job is complete you have all the advantages of the best aftermarket exhausts, but it all looks just like the standard factory exhaust did before any work was done, tips look as before, valves function as before (as nothing was changed other than the internals), so its very warranty friendly and incredibly cost effective.