Compare it to a gt3, or just a 996 stock exhaust. There more flow through and def. make more power. The exhaust for my motor was never slammed into each other forcing it back to the motor  Just saying I think I have some more power to gain with a more open exhaust. I just hate drone....
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
|