It is not recommended to remove the catalytic converter and replace it with a flowmaster or any other type of aftermarket exhaust system. Removing the catalytic converter can cause your vehicle to fail emissions inspections and can also be illegal in some areas. Additionally, removing the catalytic converter can reduce the efficiency of your vehicle's engine and may cause damage to other components of your exhaust system.
If you are looking for a way to improve the performance of your vehicle, there are other modifications that you can make that are both legal and safe. These include:
* Installing a cold air intake
* Upgrading your spark plugs and wires
* Replacing your exhaust system with a high-flow cat-back system
* Tuning your engine with a performance chip or tuner