Claimed 20% higher output over stock. It is relatively cheap (US$45 including shipping to Singapore) and its a good time to replace my internal coil.
If you looking for serious upgrade to the ignition system, go for MSD full ignition system instead ($$$). My intention to keep the stock look and it was claimed that the stock ignition system is good for 600hp ;p.
Comparison between the stock coil and the ACCEL coil
See my post on Distributor Cap and Rotor Swap on how to remove the distributor cap and rotor.
Just remove the coil and replace the new coil accordingly. Just reverse the steps and it is done!