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unless you are running a high power system or have shortages already.... you wont notice much difference w/ any voltage system. if you do notice any it will be very minimal.
I bought it was cheap, not sure if it does anything but i'm sure it doesn't hurt anything either so why not.....I'll let you guys know if i feel any difference with it !!!
JBrady is test fitting a 430 Y pipe on a 400 soon to see if his headers will bolt on if not JPI is making a set of headers for the GS430 in stainless. So we will know soon whats going on.
I have the full MR system for my 03 GS3 and i didnt notice much in torque or power response but i did notice a signifcant increase in gas mileage. Given Ive only had the car for less than 2000 miles, I fill up using CA 91 Octane at close to 3 bucks a gallon, probably why I went GS3 over a 430. My first 2 fillups, with normal highway and city driving, I got about 320-335 miles on a full tank, of course I didnt run it till tank completely emptied, but to where the light goes on. After installing the Sun System, I was able to get 355 on the fist tank and Im on my second tank now. Ive got about half a tank left and its at about 198 miles, so Im thinking maybe I can get about 350+ on this tank as well. Sure its not a lot more, but enough to warrant spending an one time $250 on and saving gas overtime. In N. Ca where 91 is like $2.89 a gallon, its worth it.
*On a side not, my buddy's Infiniti G20 with the same Sun System, drove from SF to Covina on one tank. Yea its a 4 banger, but 420 miles!! on a G20 modified with intake is pretty damn good