Custom exhaust or pre-made exhaust - which one makes more power?

[fuji]

Hey guys, I have a naturaly aspirated Yaris HB just like the majority of us. Which exhaust system actually makes the most power for our cars???

I live in Hawaii - is it better to get a mandrel bent exhaust system from the header back or buy components such as a nitto midpipe and such and assemble my own?

Which is the better way to go???

[gwasabi]

If your gonna stay N/A then stick with one of the premade ones

[CASTREX]

It really depends on the local availability...

You'll see, if you have a competent muffler shop near you.... You can probably have made a custom exhaust from the cat back for the same price it will cost you a brand name axle back.

The custom piece won't be as shinny though!

Regarding power, you will always obtain more gains from a cat back set up... as long as it is done properly.

[gwasabi]

From What I experienced, The cat back setup that I have (Which is straightpipe back from the first cat) actually loses torque compared to when I had the Greddy Ti-C Axle Back. I think if it's for N/A you should go with a prefabbed one and add grab yourself a Corolla Throttle Body. That throttle body made a big difference especially on the H1 when your in higher RPM.

When I didn't have the TB in the car was hesitant to go over 60 but with the TB goes 80 easy.

[gwasabi]

Since your in honolulu, If you want to meet up, I'll let you do a little test drive on my car so you can see the difference

[fuji]

Hey Gwasabi,

Corolla throttle body? What year? I should definately look into that.

[AlexNet0]

Corolla throttle body? What year? I should definately look into that.

^06 and up because of the drive by wire, corolla or matrix that has the 1zz engine

[lilredrocket]

What is the difference in mm between the 2 TBs

[gwasabi]

I think its like .25 or .5

[lilredrocket]

is that in inches or millimeter