Made my own bell mouth adapters to bump the 2.5" air intake…
Made my own bell mouth adapters to bump the 2.5" air intake tubing up to the 3" required for the air filters. Just a 3" header reducer welded to a section of 3" exhaust pipe. Should be pretty good flow wise. These are just clamped for mock up. Later I welded everything solid. I'm using 2.5" fuel filler hose as couplers. It's much cheaper than silicone, rated to 20 psi, and much more rugged than silicone.
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