Why do you want to swap out something smaller? A 255 Walbro isn't unheard of for custom setups on the Focaljet. How much HP do you want?
My exhaust is fully 3" and that's overkill for my setup, but no way am I going to downgrade to something smaller. Granted if I had to do it over, I probably wouldn't go that big, but what's done is done. And I guarantee my exhaust is louder than your fuel pump.
2000 Rio Red I4 Cougar
200whp & 210wtq at 9psi
254whp & 276wtq with NX 35shot
WRX TD04 Turbo, Cut Short Shifter, Strut Tower Bar, 17" ZN Wheels, Roush Springs, Starion Intercooler, NX 35 shot, HKS SS BOV, Full 3" exhaust,StreetFlight Chip
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