@innocentdevil here wat i think u should consider
as Storm said frst of all u l need to improve ur power to weight ratio which basically means remove the cng cylinder and drive ur car on petrol.
2 nd for the performance upgrade you can either throw in a air filter prob a gud branded 1 and try to find a custom piping for it frm a gud mechanic ...+ u can add some platanium spark plugs n wiring and lastly a gud exhaust not the taiwan or chinese 1 go for gud brands and prob full exhaust systems
frst try to experience ur ride on lower mods then go for higher mods copz it will help u understand n feel the diff
for more out of the performance u can add some after market clutch plate or lighter flywheel ....u can get a msd and configure ur launch n other settings or prob throw in nitrous 50 shots but remember i think throwing in nos on stock internals tht too of suzuki is just nearly has comitting suicide , but saying tht its up to u ...
for the interior things its all up to u wat ever u lyk on the shelve u can put it
now about the exterior u can get ur windows tinted ( driver n passenger side windows 30 percent and the rest u can put 100 percent )
the reason being is tht it will help u in the vision during night tym
for bumpers dont go on with bulky kits just add some extensions or lips and keep it clean ..
if u want u can also lower ur suspension just to give tht jdm type of look xd
and ya remember when going for changin tyres n rims keep ur preference on light weight rims and gud tyres for traction
