Thanks guys for the input. I received my Thunderbolts Cats but have not installed them yet.
I would also check the tuning as recommended by Charlie.
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72 Camaro RS:SOLD
68 Camaro:
LS6 Engine,Tremec TKO 600,5 Speed
Complete Speedtech Subframe Kit,Speedtech Torque Arm, 9" Rearend from Strange, Wilwood Brakes, Minitubbed, Hotchkis Subframe Connectors, FIKSE FM5s
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