Re: v6 hp
You can change the muffler for a better sound but deleting the cats will provide no benefit, is illegal, and will cause a constant check engine light.
The factory exhaust system is already tuned for best mid range power, in the 60's and 70's cars came with crappy restrictive exhaust systems so upgradding served a purpose. Modern cars are designed to get every ounce of power and efficiency out of them.
Your best bet is oem y pipe and cats, and then a cat back system like a borla or magnaflow to change the sound if you so desire.
Last edited by Dirtman; 12-30-2018 at 10:36 AM.
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