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Mario131LE · 03-17-2021, 10:02 PM

Hello all! First time starting a thread.
I’ve got a 2013 SS 1LE with NPP’s. I’m looking into getting TSP headers with HF cats. Do you guys know if there is a difference in “loud” with HF cats and off road pipes?

03-17-2021, 10:02 PM	#1
Mario131LE Drives: 2013 1LE Join Date: May 2020 Location: Bay Area Posts: 2	2013 1LE , looking to buy Long tubes Hello all! First time starting a thread. I’ve got a 2013 SS 1LE with NPP’s. I’m looking into getting TSP headers with HF cats. Do you guys know if there is a difference in “loud” with HF cats and off road pipes?