Hi All, During the week Exhaust Technology treated my vehicle with a new custom made 3.5 inch stainless steel exhaust system...at $2,500 it isn't the cheapest option...however arguably it is the best...listening to this system is better than sex with Jennifer Hawkins...hmmm...maybe not quite... ...if you're looking for a premium exhaust for your pride and joy then I highly recommend seeing Mark at Exhaust Technology. I note that many posts ask if a tune is necessary after exhaust modifications...the varied replies often received just leads to confusion...the reason is...it just depends on what other modifications are installed...and the current tune...what isn't debatable is that after exhaust modifications the vehicle should be dyno tested to ensure the safety of the engine...in my case the vehicle was running lean with turbo spikes...driving the vehicle under these conditions could of been disastrous...be warned! Finally...big thanks to David and the boys at KPM Motorsport...with no booking...they resolved my problem promptly with high flow injectors and custom tune.