b5 s4 exhaust 4 inch single or AWE Twin 1 help me decide
 

i bought a b5 s4 with a awe twin 2 i have a awe twin 1 from my totaled s4
was going to swap but then thought about a custom single 4 inch is there any horsepower benefit or should i just go with my twin 1 which i already know sounds really good any help appreciated