Thanks guys - Marlon, fade2grey, richward, Steve abt the length thingy.
On tuning, checking Marlon's pulse tuning.
Meantime, touching on the life line,
1) Fuel Injector Cleaner - what do you use? since its tested and the result is good, would like to try.
2) Spark Plugs - am currently using Goldenlodge, previously Bosch Superfour.
3) Spark Plugs Wire - replacement, which brand do you recommmend for an upgrade.
About my air intake set up, using the original with Novitec panel filter - cleaned and oiled. Currently, routing the pipe from the box down towards the opening next to the fog light and putting a heat shield cover over the exhaust manifold. Any good?