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Corsa double helix x pipe vs secondary cat NPP
Wondering if anyone has mated the corsa double helix x pipe to the stock npp. It seems like it could be louder than borla 60606/ regular secondary cat delete.
Wondering if it would net significant volume increase over just regular secondary cat deleted to be worth doing with npp to keep valves instead of an axleback?
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2018 1LE
2nd 6th gen
SPL Toe Arms/Brembo HTC64t/Corsa NPP/Tremec MTF Fluid
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