GP6T any person even half way into performance would know what a gutted x-pipe is oh, wait let me explain to it to you A gutted x-pipe would mean it originaly had catalytic converters on it but the catalyst have been removed (perhaps for better performance), wait do you know what a catalytic converter is? Now mister auto math einstein, weight does not matter as much going down the road because it does not need that inital ump.
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