Outer Limits 4x4 Board

I saw this on ebay and wanted to know if it would really make a difference??

http://cgi.ebay.com.au/HP-POWER-PERFORM ... tsupported

will work best if fitted with these other items

http://cgi.ebay.com.au/SAVE-GAS-FUEL-FI ... 286.c0.m14

http://cgi.ebay.com.au/Turbo-Supercharg ... 286.c0.m14

I see. thanks