I was wondering if i need to change my exhaust, right now i have an rsr exmag and love how quiet it is, but the piping is 60mm and i think 2.5 inches is recommended, so should i upgrade to something bigger, im gonna be shooting for around 300whp

 

i have a guy tryin to sell me his thermal 3inch for 250 bucks, but im not sure about fitment because my car is lowered 2 inches, what about some 2.5 inch mandrels from kteller and a magnaflow muffler?

 

dont worry about it 60mm=2.36in

so unless 0.14inches is going to give you some power but i don'tthink it will

 

well its a chambered muffler design, and thats what makes it quiet but its not prefered for air flow, i can pick up a 3 inch thermal catback for 250 from a guy i know so i might do that, because parts alone from kteller to do a custom setup is 315 dollars