2zz-ge TRD exhaust manifold vs factory manifold

[ShiXtr]

Hi all,

Can anyone tell me the difference between the 2zz-ge TRD tuned exhaust manifold and the factory 2zz-ge manifold?

The reason why im asking is because a toyota mechanic has advised me that there will not be much of a difference between the 2 as the factory 2zz-ge already has a pretty good exhaust manifold from factory and the diameter and tubing patterns are quite similiar between the 2.

What im thinking is...if they are similiar, then why did TRD develop a so called "tuned" exhaust manifold for the 2zz-ge ?

Would really like to have some light shed on this or if anyone has actually installed a TRD exhaust manifold on a 2zz-ge and found a difference from it.

Thanks heaps!!

[Mr Revhead]

iv sold 2-3 of those and no one has complained yet!

i have no dyno figures to compare, but i can tell you TRD are not in the habit of selling stuff that doesnt work.

for best results i think if you do the whole exhaust and maybe some intake mods, say maybe the TRD CAI you will notice a definite gain.
a customer of mine in nelson did those and he was most impressed.

however, as your car is a road daily driver, maybe some suspension mods would help you get more fun from it?

[TRD Man]

We supplied 'many' of these to TOCA members in Australia. One or two them posted dyno sheets and, whilst I can't recall the exact numbers, the improvements were significant. (I'm thinking 12 ~ 15hp and a very noticeable improvement in driveability)
As Warwick has said, coupled with a CAI it's an impressive modification with pulling the motor apart.

[kompressor]

They are almost identical sure they will flow a bit more, same can be done with the factory one if you understand how to flow them correctly.

A lot cheaper too!