Bolt on's in perspective
I think we all need to step back and put the V6 3.7 in perspective. If we double all the engine metric's it really becomes apparent just how powerful the engine is...STOCK ! The engine becomes 454 cubic inches with 610 horsepower and 560 lb.ft, of torque! Now, what BOLT ON would you put on that engine that will give you a measurable improvement? There are none, short of a power adder like NOS or a blower. So I wouldn't look for miracles from some packaged product that someone thinks was so effortlessly left out of the design at the factory. This is one serious little engine. My Mustang eats 350 inch LT-1 GM's like it's dinner time.