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VY SS Lost power with exhaust change

InsanitySorrow

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Joined
Oct 23, 2018
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Age
30
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Wollongong
Members Ride
VY SS Commodore
Hey guys
I have a VY SS that currently has a mafless tune, OTR and exhaust.
It originally had an xforce 2.5 inch exhaust with advance headers, and had 2 hotdogs instead of mufflers.
The exhaust had a heap of cracks and holes in it so ive just changed from the cat back to a difillipo 2.5 inch with mufflers.

Since changing it, its lost an extremely noticeable amount of power. Its a gutless peice of **** now.
Its also a lot quieter.

Would the loss of power be because of the added restriction of the muffler boxes instead of the hotdogs?
 
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