Injen and K&N are some wide spread intakes cuz of our SAI.
As for springs, depends on the money, how low you wanna make it, and ride quality. I finally just got my springs in, getting them on tomarrow. I got the Eibach Pro kit.
Cooljay's Black 2007 Pontiac G5 Base AkA Black Knight
Injen CAI, DC Sports Catback, Interior Trim painted red, 3 Gauge A pillar, Eibach Pro Springs, SS High Rise Wing with CF Center, Painted Rear Drums and Front Calipers, MSW Type 11's 17x7's On Kumho's.
To come: DC Sports Strut tower bar, Body Kit, CF Hood, Turbo, Halo Headlights, 17inc Foraged Rims, Front drilled and Slotted Rotors, SS Struts, Comp. Kickers.