my advice... if you can afford... only go for branded stuff from hks, greddy etc for exhaust.... do not make custom exhausts or chinese stuff... the stock exhaust is factory tuned.... you can improve upon it marginally... wont really justify the cost...
other than that... some really good cars have started popping up on pakwheels lately.... i had just been wondering where the heck they had all been hiding all this time.....!!!