- Dec 2, 2006
- 11
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just wondering if those granatelli sparg plug wires really give you 15 hp? also does a set of pulleys add hp to?
is it for a 99+ then that would be COP's and on a N/A motor maybe like 8hp

IMHO pullies are a waste of money, and plug wires would be too...especially if you have a 99 or newer mustang which doesn't even have plug wires.
i have 3.73's and what do you mean by tuning? a hand held tuner? or where do you go to get a tune?
Wow, didn't know the '99+ had no plug wires. Learn something new everyday.COP= Coil On Plug meaning we dont have plug wires
One of the first mods you need are gears. 4.10s for an auto. With them you need a chip/tuner (go with SCT Xcal2 tuner) that will correct your speedo and also make a massive difference to your auto shifting, and add 10hp along the way.