USMCrebel

would it make a difference if say i cut out my mufflers and replaced them with some LM2's vs buying the cat back?

i really don't see what difference it would make any help her would be appreciated!

03MachMe

would sounds like *** if you ask me but yea it would be like getting the cat back but not the 2 1/2 pipe you would be keeping your 2 1/4

USMCrebel

why would it sound like ***? the pipe is the same - size.
Im trying to be a cheap bastard here LOL

jmac72187

I don't think it would sound bad. You would just be keeping the stock piping size.

USMCrebel

so you don't think it would impede the flow, or anything? anyone know if anyone has done this before and has sound clips?

USMCrebel

No one happens to have an LM2 cat back laying around do they?

USMCrebel

spent the hour discussing cat back vs weld ins with a co worker, and reading on M1R and the muff are the restriction on exhaust for the mustangs, multiple members have dyno'd before and after catback/ weld in's the weld in showed an average gain of ~11-13rwhp and 8-12 rwtq where the cat back show a gain of 12-15rwhp and 10-16rwtq.
So not that big of a difference in power at least not enough to make 1/4 numbers improve until you start modding heavily. then the stock H was removed and replaced by O/r. both welds/ cat backs show gains of ~23-28rwhp (tuned) and about the same in torque, the torque was actually higher with the O/R H/X stock piping and the weld ins due to back pressure than it was with Cat back (2.5") O/R H/X

*now dyno's all vary so there is a margin of error. But it is the standing of Most M1R exhaust experts the the .25" increase helps minimally and most of that is not the size of the pipe, but rather the mandrel bends in the pipe being smoother giving the extra 1-3rwhp and 2-5rwtq

Furinox

It would sound alright, I'm not a fan of the LM mufflers, especially if you eventually go to an O/R pipe.

USMCrebel

LMII are nothing like the LMI

Furinox

Actually they are exactly the same as LM 1's except there is packing in the 2's.