How much 'better' are they over the 01-04 intakes? Is there a huge benefit of them vs the stock piece? Also would it require anymore parts to put on the car like the air intake or TB?
They are a little better than the stock intakes, however there are alot of Bullitt specific parts that are required for the swap. Unless you can find one that has all the swap parts included, it isn't worth it IMO.
With a set of good flowing heads and cams that can make the most of the RPM potential the Trick Flow intake can offer, its a fantastic intake for the price.
The stock intake tops out at about 200 CFM per runner (the bullit doesn't really offer a lot more than that, 210ish I believe) , most ported heads will run out of intake well before reaching their own limit. If you are building your top end to make power beyond 6500 RPM, neither the bullit or the stock PI will benefit you as well as the Trick Flow (or the Edelbrock).
If you are building your top end to make power beyond 6500 RPM, neither the bullit or the stock PI will benefit you as well as the Trick Flow (or the Edelbrock).
>6500 sounds VERY rev happy (and way too much fun ), is it possible to build the top end on a 2V using the TFS intake and a nice set of heads & cams such that it flows enough to Tach out like a stock 4V?
If you are staying naturally aspirated, you only have so much torque to work with. Outside of increasing displacement or a significant bump in compression ratio, you have to use RPM to make more power. The upper torque limit on a 11.0:1 CR mill that I have seen is about 340ft-lbs rwtq (at roughly 4700 RPM). If you managed to make that torque at 6500RPM, which I haven't even heard of, you are only looking at 420 to the wheels.
6500 is just a tune away on a stock rotating assembly. Most quality built shortblocks can easily handle 7000-7500 RPM . A decent set of springs is all you need to fortify your valvetrain to handle more RPM.
Believe it or not, the Trick Flow heads can easily flow enough air to support 8500 RPM on just 4.6 liters (but don't try it without the rest of your setup being able to support that as well). With the right setup, you truly are only limited by your RPM. You will need a full exhaust, a proper cam selection, and an optimized intake setup to feed either TF or ported 2V heads. That includes the TF intake with its very generous 9 liter plenum volume. It will work well to at least 7500 RPM. Beyond that you are looking at a custom sheet metal intake.
It may not be the best combination down low in the RPM range, but as far as peak power and power under the curve is concerned NA, you would have to spool a 4V very high to make more power than a fully built TF 2V setup, and it would need a good bit of work as well just to keep up, let alone exceed the TF setup.