Smoke is bad, just fyi you going to get bashed asking for that. If you want the best, get EFI live from one of the tuners on here, an intake would be good, the LB7 intakes are horrible, S&B would be a good one that wont brake the bank. What are you talking about "vavles"??
2003 2500HD LT CCLB, EFILive by Idaho Rob, 4" MBRP, Diamond Eye Down Pipe, Ported Intake Horn, S&B Intake, PPE Boost Valve, ADII, Nicktane CAT Adapter, CTS Insight, Cognito UCA, Rare Parts Tie Rods, Cognito Brace kit, Bilsteins, Gear Alloy wheels, Hankook RF10 285's, All on Mod, DDM 5k Low's & 4300 Fogs, air horn, on board air, limo tint, blue led interior