I can post admitting I have never used a BBK, and I have an LS6 intake on my car, maybe I am a bit biased but oh well. I see 2nd gen fl 'bird says the BBK is the best bargain, I respectfully disagree. Now, a
brand new LS6 intake can be st your front door for $490 (i got mine new for $490), and a used one for ~$300. After searching some dyno charts, an LS6 intake w/ a ported stock TB seems to produce about 5 less hp than the BBK w/ the BBK85mm TB. However, the BBK intake alone cannot be had for less than $490. Also, since the BBK intake has an 85mm inlet, the stock LS1 78mm TB would make the larger intake inlet diameter useless, you would want to buy a 85mm TB to utilize the larger inlet diameter. The 85mm BBK brand TB is ~$270, therefore, buying the BBK setup, the ~500 intake and ~$270 TB runs around $760. Pay $300 for a used LS6 and spend a couple hours to port your TB and you'll be about 3hp less than the ~$760 BBK setup. Granted, the BBK pretty looks cool and all, but putting money into the equation, the LS6 intake is surely the best option. I went with the LS6 and am happy