Originally Posted by RPM
LET -
What is the HP difference between the 178mm and the 181mm pulleys?
Thank you.
The 181mm pulley is brand new and has never been installed before. It is a happy middle from the 178 and 185 setups.
I'm going to assume that 15-25whp will been seen over the 178mm setups. However, one should not expect to throw on a 181mm pulley (stock SRT6) and compete with a Stage 1 SRT6 (178mm, tuning)
Pulleys / Tuning is the key to unlocking all the power of the car.
Comparing apples to apples, the 181 will make more power than a 178mm all day long.