looking to get mac off road h pipe from american muscle.com just wondering if the would fit with my already installed SLP loudmouth 1 cat back...... does the size of pipe matter.. i think slp is 3.5 in?? and mac in 2.5in??

thanks. also HP with mid and slp.??


USCG MATT!

 

slp is 2.5 inch. I have a mac prochamber right now and the fitment of the catback to the midpipe sucks really bad. I am going to be getting something different tomorrow and i'll see how that fits. For the price, the mac stuff is great, but other than that i'd go with something else.

 

Yes it will fit. Just make sure you get the "regular length" midpipe instead of the "shorty" midpipe which would be used for long tube headers.

Catback and midpipe together, you might see 8 rwhp. No gains there, until you add long tube headers.