If this is stock:
Gear / Ratio C150 5MT
1st 3.54:1
2nd 1.90:1
3rd 1.31:1
4th 0.96:1
5th 0.81:1
Reverse 3.25:1
Final Drive 4.31:1

and this is TRD:

Part number : 33030-EP702
Gear / Ratio C150 5MT
1st 2.786:1
2nd 2.059:1
3rd 1.600:1
4th 1.273:1
5th 1.042:1

Part number : 33030-EP752
Gear / Ratio C150 5MT
1st 3.200:1
2nd 2.359:1
3rd 1.850:1
4th 1.458:1
5th 1.167:1

If we wanted lower rpm's in 5th gear, wouldn't a lower ratio or is it higher ratio? Confused...

That does'nt make sense. You really want a 5th ratio LOWER not higher. These things woudl be reving out like mad!

from the FAQ at http://www.scionlife.com/forums/viewtopic.php?t=39360&highlight=gear+ratios:


D. C150 5-speed Manual transmission
1. compact, lightweight, 5-speed manual transmission
2. specific to U.S. market xA & xB
3. Gear Ratios

Gear / Ratio C150 5MT U340E 4AT
1st 3.54:1 2.84:1
2nd 1.90:1 1.55:1
3rd 1.31:1 1.00:1
4th 0.96:1 0.70:1
5th 0.81:1 –
Reverse 3.25:1 2.34:1
Final Drive 4.31:1 4.15:1

4. High numerical final drive ratio = very short gearing
5. Short gearing improves acceleration

Ok, so the TRD kit is probably geared for racing applications. Darting out of corners adn such. Got it.