one is a walbro 255 pump for 120 bucks while the other is a racetronix walbro 250 and contains a harness can someone please explain the differences in the two and is the harness worth the extra money?? thanks a bunch cause i need to order tomorrow!

 

I just installed the Racetronix 255l kit in my Impala SS this past weekend. It is well worth the money. The harness keeps a constant voltage to the pump at all times. Even at WOT there is no voltage drop at the pump to keep a constant flow to the injectors. My car was easy due the tank is in the back and comes down by taking out two bolts to drop the tank straps. Yours is different. You will either have to drop the rear end and drop the tank or cut a hole in the hatch floor to get to the tank cover for the pump. either way not fun. Good luck.
HVY SS

 

All these questions are addressed in detail on our web page here:
http://www.racetronix.com/Racetronix..._Pump_Kit.html

You should also consider picking up the Nov '05 issue of GM High Tech Performance as there is a full article in there covering the installation of the F-LT1 system and injectors.

 

Reader's Digest Version:

The factory should have used fatter wires. The kit corrects that shortcoming.

 

I bought my racetronix kit over 2 years ago, I finally had the need to install the new unit, and it rocks!! I still have to install the harness, but at this point its not "needed" and im too busy to far around with it.

But I will be doing it this winter, as with my cam swap.