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High flow 3" cats run about $38 each. The Pacesetter y-pipe I got cost $129 shipped. I'll be getting the cats welded into the y-pipe at some point in time to stay legal. The free flowing cats don't rob much power at all. The muffler robs a lot more than the cats. But until I get the cats added, I have to run the O2 sims (paid $50 on Ebay) so the computer stays happy(although it doesn't really matter since I already passed inspection in Nov).
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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