so i have an 87 rx7 fc and i have racing beat headers and just a full straight pipe to random mufflers that i dont know the name of but it sounds raspy and it kinda sounds shitty but i like how loud it is rn and it sets off car alarms sometimes thats how loud it is so i wanted to know if there are any mufflers that make the sound deeper and still be loud and aggresive sounds (fyi i have a street port n/a 13b and thats all thats been done to it)

 

welcome to the board.

you will need to add some presilencers to the system. they will cut the sound, both harshness and volume. in fact, you already have a RB header, why not get the rest of one of their systems? if it's a matter of cost, then i think you can get it in sections, so maybe get the middle section, then do a custom rear section. you could also try to build your own, but don't try to reinvent the wheel, model a custom system using their template and buy the parts to have someone local fabricate it. you just need to understand that if you don't use use thick-walled pipes and mufflers with stainless steel wool packing, then you're likely to be replacing things a lot more often.