Has anybody tried out a VR Velocity Stack from VaraRam Industries? http://www.vararam.com/

They state it added 22+ ft/lbs to the rear wheels on a stock 04 5.3 Silverado (with Dyno Graph on the site). The cost with shipping is about $60, a whole lot cheaper than messing with a cold air kit.

Comments before I buy?

 

I serously doubt you would get anywere close to their advertised gains.

 

Most people are saying its not worth it and no way you'll see 22lbft. Its bogus and not a whole lot of people are impressed. Do some searching for what people have to say.

 

Its about half the cost of getting your TB ported.......But from what i have seen it makes You TB smaller in Size i dont See how that can be a good thing...I would Just
Spend the Xtra And go for the Full Port Cuz i have seen that make a Diff but not anything Huge......

 

I like what they say about GM's "poorly designed throttle bodies". Has anyone seen a Ford tb lately? Don't waste your money.

 

Look at the air fuel ratio on that dyno graph. Its WAY lean on the non vr run. Like they somehow kept it out of power enrichment mode to get lower numbers.
I wouldn't waste my money.

 

With that money just port your stock tb or invest in some tayler wires and some ngk's.