Originally Posted by ITR99
What about final gear ratio? I know that it improves torque but again is it hard to install?
Is today your day to start threads? LOL...
USDM = 4.40
JDM = 4.79
ATS = 4.92
Those are the most popular choices. Spoon can customise a final drive for you, if you want, but it's more expensive than the other choices.
The most popular choice is the JDM drive, but the ATS ratio does enjoy an avid following.
Don't change fourth and fifth gears if you're changing the final drive, because, although you will reduce the RPM on the highway, you are substantially negating the advantage of the final drive changes you've made.
