Just recently had pacemakers, BA cat and a 2.5" lukey single muffler system installed. very very big improvement as you can guess, definately feels like its got a lot more poke and the only think i can prove is its basically dropped my average consumption from 15.4 to 14.4 L/100. makes me happy
i want to recomend Carline Mufflers in Northbridge on Newcastle street to the perth modders, one guy owns it and one oter working there,
price was $825 fully(trade discounted thoug.. but still cheap!) fitted, plus threw in a tip to make it tailpipe long enough. very friendly and helpful guy.

yep, he did my original system. hes always f**k busy though.