as the topic says...but i want a maybe a 3" diameter..but dont know which is a good buy...just got my car two says ago..its a 1989 Si with a ZC motor..which is a good exhaust for a ZC. i dont want it really really loud...pics of your exhaust would be appreciated...thanks help me out fellow ZC people...

 

Thermal R&D nuff said

 

custom

 

thermal or custom. 3ich is too much unless your going atleast 8+psi turbo.

 

stock