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Mazda Engine General \  Will removing catalytic converter make better mpg?

Will removing catalytic converter make better mpg?

Mazda Engine General Mazda Engine Mazda Tech
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replies 3
following 3
 
derajybe   +1y
I'm planning on replacing the converter with a pipe , will that improve mpg and or performance ? 88 Mazda b2200
derajybe   +1y
Hello ???
Cusser   +1y
Or just gut them out by pounding the matrix out with a large pipe and sledge hammer?

Will it help? Only if the current cats are clogged.
dynomike   +1y
It help mine by removing just the secondary cat. Then when I installed my header this removing the primary cat as well. It helped only slightly more.
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