Holley EFI (DVD)
Length of ownership: 1 month-1 year
Pros: I have had a holley hp efi on my car for a year or so. car was professionally tuned. i was never happy with its street manners though. i came across this dvd and it simplified things tremendously. car now has great street manners and can make a 7 sec 1/4 mile pass.
Cons: did not find video soon enough.