Are there resonators in the SLP loudmouth1 exhaust system or is it just basically straight tailpipes and tips? I noticed on the LM2 and powerflow that there are replacement mufflers. Has anybody heard this in person? Does it sound like the 4th gen loudmouth system?

Also, if I wanted to replace the cats with straight pipe, what do I have to do to prevent the check engine light from coming on?

 

i think it has resonators built in.

 

The SLP loudmouth I are just straight 3inch pipe. They are a bit louder than what the videos sound like on the web. They do sound nice just need to learn how to decel to hold off on the popping. At highway speed in 6th not a lot of cabin noise at all, no problems with talking or normal volume radio. I do like them but will need to get the II to meet the muffler laws.