Currently I'm running Quad race box,F1 injector and Rokktech sensor but my EGT's can get up there pretty quick 1350 at 75 mph WOT. I'm going to do my exhaust and turbo but I'm trying to decide which one(B1 or SPS 62). Anybody have a experience with either tubo in the 2003's ? Thanks

 

I have experience with both brands of the turbos you mention.
The SPS62 will have a larger turbine wheel than the B1.

Both are quality units that are modified borg-warner (schwitzer) turbos so they are very alike.

I would go with the one that fits your budget better.