i have a 91 accord my stock exhaust is falln apart just wondern what kinda performance i will c if i run open header. open vs. full stock exhaust. also what kinda resonator should i use to keep the sound down somthing like a glass pack

 

your sound is going to be ridiculously loud and you will lose low-end tq. not to mention the pollutants you will be spewing into the air running a test pipe. unless you are going full-bore track (including FI) you should probably do either a cat-back or an OE replacement.

 

A open header sounds really bad man (in a bad way to be 100% clear ). I've heard it a couple times from other cars on the road. it's louder then any Apexi N1 @ WOT.

what kind of sound are you looking for with a new exaust? nice and quiet? quiet when cruseing around and looud when you get on the gas?

 

If you run open header too long, you risk sucking a valve, not to mention **** a lot of sleeping people off.