I have an NA with manual and no mods and I love the Sprint Booster. It makes a big difference. Also remember that it has 3 settings, off, green (responsive) and red (more aggressive). After reading comments on here I expectedt that green would be my choice for everyday driving, but I prefer using red. It took me a day or two to adjust to.....changes the gas/clutch feel. Now I can't say how well it works with an automatic or with mods but it works for me.
Agree whole heartedly.
The car should have been delivered with this mod. especially the manual tranny version.
The normal lag makes double clutching almost impossible. For up shift, no biggie. but downshifting requires a consistently snappy response. Without the SB the engine ramp up is more like "When I can get around to it,"
The Sprint Booster makes the manual Crossie a totally different, and very fun, car to drive aggressively. And allows a driver to use the engine to help maintain control and speed through the twisties. I love mine on the NA and on the SRT.