General Swap/Modification Questions

*Car/Engine/Transmission/Drivetrain: '91 Plymouth Laser 1.8L Mitsu. 4G37 SOHC N/A N/T 5 Speed Manual Transmission Front Wheel Drive

*2.0 4G63 N/T N/A Throttlebody Swap

*Questions:

-What's the benefit/significance of it?
-Is it an easy swap, a direct bolt on without any modifications/fabbing?
-Are all the electrical connections the same, and bolts/screws?
-Items/tools needed?


*2.0 4G63 N/T N/A Downpipe/Frontpipe Swap

*Questions:

-Benefit(s)/Significance of it?
-Direct bolt on without any modifications/fabbing?
-Same bolts/screws?
-O2 Sensor direct bolt/screw/plug-in?
-Items/tools needed?

the throttle body is completely different...they bolt up but the iac is different....you lose the ability of cold idling...but u gain maybe 5 hp out of a weeks worth of modification to make it work

2.0 downpipe bolts right on! but if u want the full effect of the upgrade u need a full exhaust of the same diameter....thing that sucks though is the 2.0 exhaust is only .25 bigger than the 1.8....not much of a difference at all