Exhaust Questions
A LM2 is an exhaust system which includes a bullet muffler (the LM1 is the same system with just a hollow resonator).
You can keep the stock exhaust and add a cutout, but it's pointless to have the cutout flow into a muffler or resonator of any sort. Basically it defeats the purpose.
GMMG sounds good with cats. With headers and an offroad catless y pipe it sounds like crap (my opinion).
The cutout will add power on a stock car by bypassing the restrictive factory muffler. It will also be louder but not deafening or anything.
Putting a cutout on with a LM2 is just added weight. It might also create clearance problems as that's a lot of crap to try to mount under a fbody which has limited space.





