best preformance patrs to put on a 05 chevy silverado?

[Victor]

what would be the best preformance part to put on a 05 chevy silverado 4.3 liter v6 that would improve gas mileage and horsepower for uner $400

[Jay123]

Gas is cheap bro! come on. Please don't tell me your in the US cause you guys pay WAY less then we do up here in Canada. Put blower on your ride and say f uck yeah!

[bard h]

cold air intake...that's probably it for under 400. remember to keep your tires inflated to whatever your owner's manual suggests to get good gas mileage

[kels h]

me!!!! Haha jk I love you baby!!