Throttle body/intake bore size identification. help needed

[72Z/28]

Hi guys

I have a professional products intake installed by the previous owner, and I would like to replace it with the FAST intake. However, I am not quiet sure about the bore sizes of the existing bore sizes. Also, FAST has intakes with different bore sizes and I don't know which I should go with.

Your input and advice will be appreciated guys

[71RS/SS396]

Hi guys

I have a professional products intake installed by the previous owner, and I would like to replace it with the FAST intake. However, I am not quiet sure about the bore sizes of the existing bore sizes. Also, FAST has intakes with different bore sizes and I don't know which I should go with.

Your input and advice will be appreciated guys

Do you want the Fast for looks or performance gain? If you're doing this to increase performance don't bother, there's very little gain over the stock manifold and what gain there is, is way up in the rpm's. I would opt for an LS6 manifold if I had a choice.

[72Z/28]

Do you want the Fast for looks or performance gain? If you're doing this to increase performance don't bother, there's very little gain over the stock manifold and what gain there is, is way up in the rpm's. I would opt for an LS6 manifold if I had a choice.

The FAST intake looks much nicer as the professional products intake looks too blingy as well as the heat soak issues as it gets very hot. I am not sure why the previous owner replaced the LS6 intake with the PB intake.

[71RS/SS396]

The FAST intake looks much nicer as the professional products intake looks too blingy as well as the heat soak issues as it gets very hot. I am not sure why the previous owner replaced the LS6 intake with the PB intake.
OK it's for looks which is fine if you're good with the price. You don't need the 102 in fact it can be difficult to get the low speed (idle quality) tune right with it.