So I have a 91 GMC Jimmy w/a 350 5.7l TBI and 700r4 tranny. I run a TBI spacer / pod spacer / and 14" K&N filter with a flipped lid. When I bought the truck it came with a 2.5" Ravin muffler. All the other trucks I have had , all being 89 Chevy k1500 LWB PU , had 3" flowmaster mufflers. If I put the 3" flowmaster in place of the 2.5 Ravin , will I loose torque? Or should I just put another 2.5" flowmaster on in place of the Ravin. The setup right now has the 2.5" ravin muffler flange spread open to fit around the 3" stock exhaust pipe.