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I have Dynatech Cats on the AV.
Dynatech-Long tube headers (Jet coated) & Free flow cats.
Tied into a magnaflow Large body exhauts sized up to Dule 4" at exit.
All 306 S.S. from Block to end. Am running Magnsun, KnN, & HP Tuners.....
The only issue I hsave had is the LT headers throwing O2 codes HP Fixed that.
On 5.3L LS moter!
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