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I have a 00GT 5 speed with a Magnaflow catback on it . I want to buy an "H" or an "X" WITH cat's. I know Magnaflow make's a catted x which would be good to keep everything the same.

My concern is I am running non restrictive muffler's with the MF system and will I loose low end / back pressure with an x or h pipe with hi-flow cat's ?

Will this make the car louder ? if so how much ?
Also what can I expect for gain's ? SOTP of course.

I know from searching that the debate is alway's on about which is better X vs H . My concern is the above question's.

Fall
 

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You will loose some back pressure, but thats normal, it will give you good gains about 5-15 depending on mods on car already, and you will feel it, and finaly it will be a bit louder, but deffinitely not as loud as a O/R-H pipe.
 

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i am running BBK LTs + BBK O/R H Pipe + Magnaflows and it sounds sooo nice!!!

MF also sound nice with an X pipe, such as Bassanni or magnaflow. the BBK X pipe and MF is not a good combo!!!
 
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