Does the OBX Catback Drone?

[RichS]

I welded mine together since the clamps sucked.

[XfireZ51]

Originally Posted by RichS

I welded mine together since the clamps sucked.

Really the only way to keep them from twisting and loosening up.
Especially if you?re putting out significant power over stock.

[Black Red '90]

I bought Dynomax lap joint clamps. Haven't had time to install yet.

[XfireZ51]

I used these clamps. The problem is they stretch over time and tend to allow pipe to twist. Mine are spot welded.

[Paul Workman]

Originally Posted by RichS

I welded mine together since the clamps sucked.

Yes, they DO (suck)!

[Black Red '90]

Finely got the car out for a drive after installing the exhaust. It's been a little delay since I needed an alignment done (rear lowering bolts installed same time as exhaust). I'm very happy with the results!

As others mentioned, it took a little work to get the OBX to fit properly. The post resonator hangers needed a single washer on each side to give a tad more clearance. The drivers side muffler was a different story. The tips were almost touching the bumper while the passenger side had a 5/8" gap. I ending up using 1/2" poly bushing between the body of the car and the factory mount. New bolts were needed as the factory ones weren't long enough. Worked great in the end. The tips are centered, level, and equal height side-to-side. Unfortunately, I was only able to use 3 of the 7 lap joint clamps that I bought. There simply wasn't room to allow for lap joint clamps on either end of the resonator section.

I couldn't find any videos of ZR-1's with just the OBX/Maximizer exhaust (no headers) at high RPM or full throttle. So I wasn't sure what to expect. Would the OBX be loud like the Corsa systems over 40% throttle?....NO. The exhaust has a subdued baritone sound whether cruising around town or WOT near redline. I would rate the factory exhaust 1.5 out of 10 for volume. The OBX I would rate 4 out of 10. You know it's there, but you won't upset your neighbors or draw unwanted attention when driving spiritedly.

[Ccmano]

Pair the OBX exhaust to OBX headers and it becomes more like a 7 out if 10. Low rumble at idle, quiet enough at cruise to carry a conversation but still noticeable and loud/borderline obnoxious at full throttle. With the exception of the exhaust system to header/cat connections mine is completely welded up.
H