All I can say is wow, I didn't think the 700s would spool this fast but they are not much of a change over stock. Driving down the road just touching the gas you see it go into boost. drop down in gears like you do when you are about to get on it and guess what it hits full boost just like a stock turbo car does. Im not saying by any means they spool as quick as a stock turbo but I will say its not much of a change at all. I know the 3" exhaust and MSP manifolds have helped this part out as much as they could and they do a great job. All turbo cars I have owned in the past all had 3" exhaust. the less restriction on a turbo car the faster the spool up time. I remember when 3" was the pointless mod on tt.net because 2.5" was the best all around. Now everyone has tested it and like the change it brings to the car and now its the go to mod. Anytime you can free up the air movement either in or out of the motor your going to see a hp gain and a quicker spool up from a turbo car. If it was a NA application sure 2.5" is perfect. 3" and bigger on high hp turbo cars is the way to go.
 2006 Chevy Cobalt SS super charged (Daily driver/Gas saver)
1994 Nissan 300zx sport 700 Twin Turbo (Weekend car)
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