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2.5 is fine. You'll notice a drop with a N/T with a 3inch pipe. I got a 2.5 on mine, and everything runs and feels great. No power loss. More gains. Not being restricted as much as a 2 1/4
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2013 Chevy Sonic 1LZ
Daily Driver, 1.4L Turbo, 6spd
75 Monte Carlo
SBC 400 6.6L, Aluminum heads, Hurricane Intake...
12 Chevy Sonic 1LZ 1.8L - Traded
01 Pontiac Grand Am SE - RIP
95 Eagle Talon ESi-T 5spd - RIP
88 Oldsmobile Cutlass Ciera- RIP
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