Originally Posted by
Drifting101
I want to run a 4.5 novak velocity light in a T4 but i am worried it will be too much sometime so if i turned down the Throttle epa will i need to change gear ratios and does it damage the motor?
And if it matters i will be running a GTB and 3pk with it
I recomend you start by running the Novak recomended gear ratio in your T4. And no, turning down the throttle epa will not hurt the motor at all.

Link to Novak gear recomendation chart:
http://www.teamnovak.com/tech_info/b...r_gearing.html By the way, GTB & 3PK, good choice.