AR20s and Flowmasters

[SierraMCoupe]

I've been running Flowmaster HP2 shorties for a little over a year and have been pretty happy with them. I'm not a fan of rasp and they did pretty good. I did get some drone on the highway but nothing too annoying. Sound level was about 90dB from ~50ft under hard acceleration up a slight incline. The HP2s just fit without modifying section 2 so I can easily swap to stock mufflers for 90dB track days (just to play it safe).

Anyways, I'm getting ready to install some Fabspeed headers and decided to throw some AR20s in section 1 to keep the rasp at bay. I'm happy with the results, the AR20s decreased the highway drone and the tone is a little deeper (probably because the secondaries are gone). Volume level stayed about the same, maybe a slight increase.

Warm start and revs with AR20s section 1, stock section 2, flowmaster HP2 shorties...headers coming soon

[ZStig]

Replacing the cats in section one with small mufflers was my favorite exhaust mod