I have a complete 2.5in FlowMaster Force II Exhaust System Part Number #817715 with Stock Dodge Catalytic convertors mid pipes and Manifolds if needed for Challenger R/T 5.7L. Used for the past 3 years in good condition, no holes, no rattles, with surface rust.
$250+$50 for manifolds O.B.O...
Is it worth it to put high flow cats on my SXT?
If anyone has done this, how did you like it? Did it help the engine breath better? Did it sound any better? Any power gains?
Most importantly, will it void warranty?