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Whats the best hi-flow cats for the money/cheaper. and headers.
I have a 2000 5.3 with true duals no mufflers out at 65 degree angles. are hiflow cats and headers going to make a sound difference?
I have a 2000 5.3 with true duals no mufflers out at 65 degree angles. are hiflow cats and headers going to make a sound difference?