Hey all, anyone know of the cheapest method of adding extra horsepower to my 2006 Solstice?

Thx in advance!

200 shot of nitrous = 470 horsepower $300

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2008 Black/Black GXP, purchased 7/23 right off the train.
Mod#1 blacked-out headlights
Mod#2 GMPP Intake -I like to hear my turbo.
Mod#3 Special Sauce
Mod#4 Solo Street Race
'97 Burb.
"07 Charger R/T, Mama's car
Race #1 Charger 0 /Sol 1

What do you consider cheap and how much hp do you want to add? Cheap and HP don't usually go together on an NA setup. If you want to know my honest opinion it would be gut the cat and modify the air box these are free modifications that could gain a few hp. Want to add a couple more the drop in filter is probably the cheapest mod that will pass inspection. Then there is always the Jet piggy back computer. And you always have the option of nitrous which will always be your most hp for the least money.

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The Festas!
1964 Chevrolet Corvette
2004 Pontiac Grand Am SE
2006 BMW K 1200 R
2007 Pontiac Solstice GXP