Is this BS or No????

So i've never heard of people putting in a new thermostat does that really help? and what about the U/D pulleys? I will have everything else except those two things things oh and the tuner. do those two things though give you a lot of extra horsepower or no?
 
shallowreef said:
So i've never heard of people putting in a new thermostat does that really help? and what about the U/D pulleys? I will have everything else except those two things things oh and the tuner. do those two things though give you a lot of extra horsepower or no?


the thermostat helps the engine run a little cooler. you can theoretically add a little more timing then. 160* is too cold tho. stick with 180* or stock 193*. U/D pulleys do make a difference. something like 5-8rwhp. it's a good mod for the N/A people.