First off you have to spend money to make power, second the only way your going to get power out of your ls is to boost it or go lsv, maybe your best bet would be turn around sell the ls and use the money you wanted to spend on intake and header to buy a gsr?
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2001 King Ranch F.150 (sold)
1991 5.0 Ls mustang (sold)
1993 ls cx hatch (traded)
1995 b16 eg coupe (SOLD)
2007 Hyundai Tiburon (sold)
2006 Yamaha R6 (sold)
1995 jdm b20b integra (sold)
2006 Mitsubishi fp red evo (dd)