Custom exhaust advice

infernosg · 05-29-2013, 08:23 PM

Extra points to anyone with the Defined Autoworks exhaust manifold.

Trying to figure out the best way to build a single exit exhaust that maximizes performance but keeps sound intensity below 92 dB so I don't get black flagged. With the Defined header I've probably got space for two suppression devices with a single exit. Logan recommends Borla XR-1 mufflers but would two of those in series be enough? What about a Racing Beat presilencer into one of their mufflers? Two Racing Beat mufflers in series? XR-1 into Racing Beat muffler? Other ideas? Not really wanting to run a dual setup.

05-29-2013, 08:23 PM	#1
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA Posts: 811 Rep Power: 16	Custom exhaust advice Extra points to anyone with the Defined Autoworks exhaust manifold. Trying to figure out the best way to build a single exit exhaust that maximizes performance but keeps sound intensity below 92 dB so I don't get black flagged. With the Defined header I've probably got space for two suppression devices with a single exit. Logan recommends Borla XR-1 mufflers but would two of those in series be enough? What about a Racing Beat presilencer into one of their mufflers? Two Racing Beat mufflers in series? XR-1 into Racing Beat muffler? Other ideas? Not really wanting to run a dual setup. __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS