If you performance mod the vehicle, you're basically throwing your powertrain warranty away. Chevy will look to blame your mods for any powertrain issues. Some say they have to prove it, but unless you're willing to spend a lot of $$ on legal fees, they will screw you.
In my opinion, a measly 500HP at the crank isn't worth the loss of your warranty. If you want a very reliable option , go with a Magnuson HB supercharger. You'll get up to 550rwhp + a 3-year powertrain warranty:
http://www.magnusonsuperchargers.com...-62-382-bl.htm
I went with this option. My dyno run was 532rwhp. If you're greedy, you could potentially get another 30-35rwhp with a Rotofab CAI and a Magnuson tune which is supplied by Magnuson specifically for the HB supercharger + Rotofab setup. Be prepared to replace your rims and tires. I went with 285/30/20 front and 305/30/20 in the back w/Nitto NTT5 G2 tires to get more traction. You get a ton of torque in the lower RPM range so be prepared for spin city if you don't upgrade the tires.
There looks to be a certified dealer/installer in your area:
THE HOT ROD SERVICE
1090 FLORENCE WAY, CAMPBELL, CA, 95008,
Phone: +1-408-374-4452
Email:
jeff@hotrodservice.com