I'm thinking of putting a flowmaster 40 on my wrangler. I will be keeping the stock cat and manifold. I'm concerned about backpressure, as I don't want to loose my low end power. Does anybody know if the flowmaster 40 is too wide open for the wrangler? Also, does the 40 series have a tendency to drone loudly?
2006 Silver Metallic X
I promised the wife I'd keep it stock............I lied.
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